Flooding Fireblades: Sorting the fuel system on a '97 CBR900RR

Butterfly is under-gasoline...

Weather's closing in on us up here in Canada.  I had the 'Blade up on the bike lift last week thinking the riding season was over as we got buried in our first snow storm.  The next week suddenly warmed up due to a tropical storm somewhere, so I primed the Honda and got it going again (I'd run it dry in preparation for winter hibernation).  Unfortunately, it flooded itself and ended up with the first two carbs full of fuel.  You can see the wet in carb bell on the left.

I think from now on I'm going to turn off the fuel tap from now on whenever it's sitting rather than trust this touchy carb set to do the right thing.  Instead of taking the Fireblade out for a weirdly warm ride on Sunday, I was sitting on the driveway removing the carbs and changing the oil.

On the upside, pulling the carbs gave me a chance to replace all the rubbers (airbox and engine side), which needed doing (I'd been holding them together with some cunning chemistry).

New rubber bits on old bikes make a huge difference.  Even the engine side ones (which still looked good after 23 years of service) were hard and unyielding compared to the new ones.  I'm curious to see how the new ones seal in comparison.  I got the airbox rubbers from KW Honda in Waterloo, who were very responsive on email which hasn't always been my experience with local dealers.  They got four rubber airbox boots for a 23 year old bike that's been out of production for decades in less than a week, during a pandemic.  It's good to know my local Honda dealer supports older models.

I picked up a second carb set from NCK Cycle Salvage in Woodstock last fall for less than the price of the broken bits I needed to replace on the one that came on the bike.  I now have an entire second set of carb hard parts I can go to if I need any other bits.  The set they gave me (other than needing a choke pin on one of the carbs) was complete and balanced, and when I threw it on it worked a treat, so I ran it all summer having never gone through it.

With the carbs off in the late autumn sun last Sunday, I finally took the float bowls off and discovered that they were pretty grotty (when I emptied them the fuel came out brown).  It didn't take long to clean everything up, and I got carb cleaner deep into the jets and upper parts of the carburetors too.  It all went back together nicely and I was also able to lubricate and clean up the throttle action with the unit out, though it already moved sweetly.

With the new rubbers on, I put the carbs back on after work this week and they came back together nicely.  It's a good idea to attach the two throttle cables to the carb set while it's still loose.  Once the carb set is on the bike getting the cables on is a real bugger.

I went over all the fasteners as I went making sure everything was snug and leak free.  I've still got to put new oil in it, but we have a above zero day this Saturday so I'm hoping I can take the 'Blade out for an end of year run to make sure everything is five by five before I hibernate it for the winter.  Months hence after the winter of second-wave COVID pandemic, the Honda will be ready to go with fresh oil and a clean and capable set of carburetors.

This forgotten Honda is a real treat to ride this summer and is a very different thing from the Tiger.  One is a long distance tool built for pretty much anything, the other is more like an aeroplane designed for the road.  The 'Blade weighs over 20% less than the Tiger and makes almost 40% more power.  On interesting paved roads the Fireblade is in a class by itself.  Unfortunately, I live in a place deficient in interesting roads and track days in Ontario, even when there isn't a pandemic, are needlessly complicated (you basically have to show up with a race bike or rent something, there are no ride-on days for road bikes here).

The other nice thing about the Honda is how it's built for a single intention.  That focus on light-weight means getting in to work on it has been accessible and enjoyable.  Honda's aren't just designed ot run well, they're designed to be worked on too.  As my first Honda this bike has been a positive introduction to their engineering and design philosophy.

If I lived somewhere with interesting roads and reasonable track days I'd be hanging on to the Honda indefinitely as it was designed to express the dynamics of riding, but living in South Western Ontario, devoid as it is of interest, means I'm going to try and move the Honda on in the spring... assuming anyone is left post second-wave to buy it then.  I'm going to miss what it can do though.  Having this bike has opened my eyes to what a motorcycle is capable of dynamically.

FOLLOWUP

We've got a major winter storm (100km/hr+ winds, rain and snow mixed) rolling in, but I got out yesterday afternoon for an hour and the 'Blade is even sharper than it was before.  The new rubber seals tighter, making the engine even more responsive, and the cleaned carbs are razor sharp in responding to throttle.  When I got home (cold, it was only a degree or two above freezing), I closed the petcock and ran it dry before parking up the 'Blade and wrapping it up for the winter.

After our long cold winter with second wave COVID19 piled on top, it'll be ready to go in the spring...

My First Honda: Fireblade!

I've had a pretty diverse group of R&R  (repair & recover) motorcycles to date.  My first R&R bike was the '94 Kawasaki Concours ZG1000 back in 2014.  Purchased for eight hundred bucks and cut out of long grass to get it out of the field it was in, the Concours got sorted over the winter and put back on the road where it took us to Indianapolis and went on to over twenty thousand kilometres of mileage before I sold it on for what I purchased it for this past summer.

The Concours became my regular riding bike so I sold on the Ninja.  Eventually a KLX250 off road bike came into the garage, but didn't last long as I struggled to find ways to use it in Ontario: land of no fun.  That led to a too-quick purchase of a Yamaha XS1100 from an entirely dodgy kid that led me into the headaches of sorting ownership.  That experience has made me more cautious in buying used bikes.  The belief is that all motorcyclists are salt of the earth types, but that isn't my experience; shifty would be a better description.

So far I've been able to make money on my R&R projects, Shed and Buried style, but I don't make it easy on myself.  Both the Concours and the XS1100 were big, four carburetor bikes with spaghetti loads of vacuum tubes and complex wiring.  I've taken my time looking for the next project and tried to look for something simple, air cooled and single cylinder, but bikes like that don't come up often.  As the summer fades and winter approaches, it was time to commit to a new R&R project.

This 1997 Honda CBR900RR Fireblade came up on Facebook buy and sell.  I've found the local nature of Facebook's marketplace offers up interesting opportunities that you don't find on the hardened semi-pro sellers of Kijiji and Autotrader, where you are much more likely to find shady characters who sell a lot of crap.  This twenty-two year old non-running Honda got me curious enough to contact the seller in Alliston.

It turns out the bike had gotten tangled in a divorce and was then sidelined.  It was eventually used to settle debts between the estranged couple, but now it belonged to a non-rider with no mechanical experience who just wanted it gone.  Her new partner was trying to sell it for her, but with it not running he wasn't getting any calls.  A late nineties CBR in safetied, running condition was going for about $4000, he was asking $1200 for this one as is.

We exchanged a number of emails, both of us cautious as we'd both met idiots from online sales (it turns out the internet is actually full of idiots).  As we got to know each other I asked increasingly direct questions - was is repainted to hide crash damage? (no, the former owner didn't like the stickered stock look)  - why is it in this state?  (where I got the bad karma backstory this bike was unfortunately wrapped up in).  The last problem to solve was how to get it here.

During our give and take the seller offered me the bike for $1200 instead of $1300, and then said he could trailer it down to my place for $100, so I got it at asking price with a $100 delivery charge.  The bike showed up and we had a good chat and ended up being given a milk crate full of pears from his parent's farm too.  Bonus Honda pears - good deal.  This low mileage, non-runner seemed like a steal upon first look.  The paint's a bit rough, but for a 20+ year old low mileage bike, she cleaned up a treat.

I was told the bike was a non-runner due to the carbs.  As I got into the bike mechanically I figured I'd look at the fuel system as a whole rather than only looking solely at the carb since I didn't know how long it had been sitting.  I'm glad I did.  The fuel tank had a worrying amount of rust in it.  I talked to people on the Practical Sportsbike Magazine Facebook group (one of my go-to bike magazines and a great place to talk to DIY types) and got suggestions around various acid etching and chemical routes.

I went out to Canadian Tire aiming to get some industrial grade hydrochloric acid but found Metal Rescue Rust Remover, a water based environmentally friendly solution that neutralizes rust and prevents more from forming.  It also helps the tank retain its structural integrity whereas acid eats holes in it.  My first go at a motorcycle tank cleaning (I've been lucky so far and not had to deal with it) went well.  I left the chemical in the tank for about six hours before recovering it back into the bottle (it can be reused).  With the tank sorted it was time to look at the rest.

The vacuum operated fuel pump in the bottom of the tank was clogged and a mess, but it too cleaned up nicely.  With the big end of the fuel system sorted out, I turned to the carbs.

Compared to the buried in the frame carbs on the Concours and XS1100, the Honda's are a joy to access.  Having seen the mess that was the rest of the fuel system, I figured the carbs were crammed full of guck, and they were.  The only other issues seemed to be more about mechanical cack-handedness than wear.

Once on the bench I've been able to isolate some obvious problems.  I found a spring laying under the carbs on the engine case.  If you're fixing a carb it generally helps to use all the parts.  I also found that one of the choke pins were broken, so the choke was only working on three of the four carbs, and the choke cable itself wasn't attached correctly, so the choke was only moving about 2/3rds of the distance it should.  These are all things that would prevent the bike from starting properly.

Yesterday I took the float bowls off and had a look at the bottom end of the carbs.  The ethanol in modern fuel is not a good mix with older fuel systems, like carburetors.  Not only can it eat away at the rubber and gaskets in older systems not designed for it, but it can also leave varnish, and worst of all, it's a water absorber, so it can lead to corrosion in older, gravity fed systems.  If there was ever evidence of modern ethanol based fuels making a mess of a carburetor, it was here in this old Fireblade, where every carb bowl was worse off than the one before it.

Thanks to some judicious use of carb-cleaner, they cleaned up nicely, but does ethanol ever do a job on mechanical fuel delivery systems!  Fortunately, if I stick with super unleaded from most stations in Canada, it means I'm not running any in this old bike from now on.

I run super in my bikes anyway because they're very fuel efficient anyway so it doesn't cost much and, at least on the Tiger, the power commander means I can maximize power out of it.  For the Honda or any other carb fueled bike, you should be running super just to stay away from the ethanol.

Today I'm going to pull the tops of the carbs and have a look at the state of things (I'm hoping better than below) and finish cleaning them.  I'm also going to see if I can fix that broken choke pin on carb 4 or else I'm going to have to track down the part.  Bikebandit has it for $50US, but no one else seems to have one available.

There are other bits and pieces in this poorly looked after carb that are suspect.  Rather than use boot clamps to attach the carb to the engine, the muppet who owned it before me appears to have put some kind of rubber sealant on them and attempted to 'glue' them to the block.  This is stupid in all sorts of ways.  Bits of this rubber seal would deteriorate in the gasoline rich air-fuel mix and get sucked into the engine, and there is no mechanical connection ensuring the carbs are tight and leak free to the engine.  For a system that runs on vacuum, this is a disaster.

The boots have cleaned up nicely, so I also need to source some ring clamps for them.  The Honda specific ones are hard to find, but I'm hoping I can find some aircraft grade ones that are an engineering match and easier to source.  Oetiker Clamps, ironically based in Alliston where the Honda came from, do some nice, high quality options that I should be able to fit.

So much of mechanics come back to common sense.  The guy who owned this before seems to have had a startling lack of it.  I'm hoping for $1200+$500 in parts I can get this Honda humming and ride it for a year before seeing if I can double my money on it (unless we bond).  Safetied bikes of similar vintage with twice the mileage are going for four grand.  Even with all the work done so far, the bike hasn't cost me a penny in parts and I may be within spitting distance of sorting out this abused Fireblade.

Follow up:

Tops of the carbs were fiddly - the plungers are a pain to reseat properly, but I worked through them and all the top ends have been cleaned, though they were all in good shape as befitting a low mileage bike like this.  The nastiness was all in the float bowls.

I gotta say, I'm enjoying Honda engineering.  Kawasaki has a real heavy industry feel to it by comparison, though my Kawi experience is mainly on a big sport tourer and this Honda is built for one thing only... getting down the road quickly.  But this bike has an engineering elegance to it that makes it a pleasure to work on.

With the cackhanded way this bike has been worked on, there are a number of fiddly bits missing or broken. I was sourcing ring clamps (x8), a choke plunger and other odds and ends and found the price quickly creeping up.  I reached out to local bike breaking yards and only heard back from NCK in Woodstock, ON, who seem organized and on their game.  They have a donor carb in used, rust free (stored inside) condition for $250CAD.  That's within fifty bucks of where I was with buying bits and pieces and means I'd have a lot of spares I could always sell on after.  I'm going the donor carb route this week.

Oh, and Oetiker clamps got back to me and apologized for not having what I needed because (of course) the Honda's clamps are a special size and would require special manufacturing.  My quest for carb hose clamps continues.

NOTES:

One of the tricky bits of working on old bikes is getting the documentation you need to work on them accurately.  The internet is a gold mine for this.  If you're working on a late '90s Honda CBR900RR Fireblade, you'll find this handy:

1996/7 Honda CBR900RR Owner's Manual:  https://mototribu.com/constructeur/honda/1996/1000cbr/doc/revuetechnique_900rr.pdf

It has lots of good technical graphics in addition to all the specs you need.

***

I was also able to source the Haynes Manual for this bike from Fortnine on sale for only $35.  Most other places were over $40US, so finding that on sale was a good first step in this project.

At the moment I've got emails out to The Bike Yard in Caledon and Oetiker Clamps in Alliston.  With any luck I can source the bits I need and have this Honda purring even before the snow starts to fly, then I can spend the winter sorting out the other fluids and maintenance before it hits the road in the spring.

Evolution of Motorcycle Ownership and a Triumphant Return

Back in August of 2014 I wanted to take a more active role in my motorcycle maintenance.  At that point I'd been riding for just over a year on my first bike, a very dependable 2007 Kawasaki Ninja 650r.  I learned a lot on that bike, but it was a turn-key experience, the bike needed very little in the way of maintenance.   

The Ninja went from flat black to metallic blue and orange.  It was the last bike I rode that people commented on (I'd often get a thumbs up or have someone stop and chat in a parking lot about how nice the bike looked, which was satisfying as I'd been instrumental in restoring it from angry-young-man flat black).  The Ninja was, without a doubt, a good introduction to motorcycling, and was the king of the roost for my first two seasons.

As a first bike, the Ninja led the way both on the road and at the top of the blog.

I wanted my next bike to be one that ran because of my mechanical skills rather than one that didn't need them.  I found a 1994 Kawasaki Concours sitting in some long grass about twenty minutes away.  I quickly discovered that sense of satisfaction I was looking for.  The Concours was an eager patient who rewarded a winter of mechanical work with a rock solid five thousand miles of riding the next summer.

The Concours has offered some memorable rides, especially looping Georgian Bay and riding on the Indianapolis Motor Speedway.  For a bike that looked like it was being permanently parked with only 25k on it, suddenly it was back in the game, going places other bikes only dream of.

That busy season of long rides took its toll on the Concours though.  It isn't a spring chicken and after having spent the better part of two years parked before I got to it many of the soft parts on the bike were getting brittle.  I parked the Concours early and began winter maintenance knowing that the bearings and brakes both needed attention only to miss out on a late season warm spell at the end of November and into December.  I took that one on the nose figuring that's what happens when you ride an old bike as your daily rider.

The header on this blog for the past eighteen months, but running a twenty-two year old bike as your daily rider
makes for frustrations.  Time to be less sentimental and more rational in how I manage my stable.

That summer we were touring on the Concours I picked up a KLX250 to experience off road riding, but doubling insurance costs for a bike that I only managed to get out on a handful of times didn't feel very efficient.  That I struggled to keep up with traffic on it didn't support the way I like to ride.  Motorcycles are open and unprotected, but they are also agile and powerful enough to get out of a tight squeeze - except when they aren't.  The Concours was always there and the preferred ride, owning the road when I was on it.  When I went out with my co-rider he also loved the big red Connie, not so much the rock hard, under-powered KLX (he only ever rode on it once for less than five minutes).

Over the winter I put some money into the Concours, doing up the rims and getting new tires.  With the rims off I also did the bearings and brakes.  As everything came back together again, suddenly the carburetors weren't cooperating.  They're since being rebuilt and the bike should be back together again this weekend, but instead of always being there, suddenly the Concours wasn't.  As winter receded I could hear other bikes growling down the road, but I was grounded (again), even though I was paying insurance on two machines and longing to get back out on the road after an always too long Canadian winter.

The KLX was the first to go.  I'd never really bonded with it and, even though I always figured I'd run this blog with my most recent bike in the graphic at the top, the KLX never made it there; it never felt like the main focus of my motorcycling.  In the same week my son's never-ridden PW-80 got sold, and suddenly I had some money aside.

Ready to go with a new header, but it never took.

As days of potential riding keep ticking by and the carburetor work drags on, the Concours started to feel like an expensive anchor rather than the wings of freedom.  I had a long talk with my wife about it.  She asked why I don't unload it and get something dependable.  Keep the old XS1100 for that sense of mechanical satisfaction, but have a bike that's ready to ride.  I think sentiment was paralyzing me.  Hearing a rational point of view with some perspective really helped.

Many moons ago,
a pre-digital Triumph

With cash in an envelope I began looking around.  Before Easter we weathered an ice storm, but only two days later it was suddenly in the teens Celsius and bikes could be heard thundering down the road.  Meanwhile I was waiting for yet more parts for the Concours.  Online I was looking at sensible all purpose bikes that would fit a big guy.  Vstroms and Versys (Versi?) came and went, but they felt like a generic (they are quite common) compromise, I wasn't excited about buying one.

Since I started riding I've been on Triumph Canada's email list even though I've never come close to owning one (out of my league price-wise, no one else I know had one, no local dealer... pick your reason).  As a misguided teenager I purchased an utterly useless Triumph Spitfire, and in spite of that misery I've always had a soft spot for the brand (your adolescent brain makes your teenage experiences sparkle with emotion even when you're older, that's why we all still listen to the music from our teens).

A Tiger?  On Kijiji?  Must have
escaped from a zoo!

While trawling around on Kijiji looking at hordes of generic, look-a-like adventure bikes I came across an actual Tiger.  It was (as are all Triumphs I've mooned over) too expensive for me, but that Lucifer Orange (!) paint haunted me.

Another rare warm afternoon wafted by with the sounds of motorcycles on the road so I thought, what the hell, and emailed the owner.  He'd been sitting on the bike for the better part of two months with no calls.  He was going down to the Triumph dealer on Thursday to trade it in on a new Street Triple and knew he was going to get caned by them on the trade in price.  He emailed me back and said if I had three quarters of what he'd been asking, he'd rather sell it to me than give the dealer the satisfaction.  Suddenly this fantastic looking machine was plausible.

The garage is 100% more functional than it was last week,
100% more glamorous too!

A trip up to Ontario's West Coast and I got to meet a nice young man who was a recent UK immigrant and a nuclear operator at the Bruce Plant.  The bike was as advertised (well looked after, second owner, some minor cosmetic imperfections), and suddenly I owned a freaking 2003 Triumph Tiger 955i!

Most used bikes offer up some surprises when you first get them, and they usually aren't nice surprises.  The Ninja arrived with wonky handlebars the previous owner told me nothing about.  The XS1100 arrived with no valid ownership, something the previous owner failed to mention during the sale.  So far the Tiger has had nice surprises.  It arrived with a Triumph branded tank bag specific to the bike.  Oh, by the way, the previous owner said, the first owner put a Powercommander on it, and then he handed me the USB cable and software for it.  It had also been safetied in October, less than two hundred kilometres ago (paperwork included), so while I didn't buy it safetied, it shouldn't be difficult to do.  The bike has fifty thousand kilometres on it, but I then discovered that the first owner did two extended trips to Calgary and back (10k+ kms each time) - so even though it's got some miles on it, many of them are from long trips that produce minimal engine wear.  After giving it a clean the bike has no wonky bits under the seats or anywhere else.  I cannot wait to get riding it.

So, here I am at the beginning of a new era with my first European bike.  I've finally picked up a Triumph from the other side of the family tree (the bike and automobile manufacturing components of Triumph split in 1936), and I've got a bike I'm emotionally engaged with.  It might even be love!  Like the BMW I rented in Victoria, the controls seem to fit my hands and feet without feeling cramped and the riding position is wonderfully neutral.  When I'm in the saddle my feet are flat on the ground - just. Best of all, I don't look like a circus bear on a tricycle on it.


With the Concours officially decommissioned and awaiting (what are hopefully) the last parts it needs before being road worthy again, it's time to update the blog header:

What's next?  The Concours will be sold with only a modicum of sentiment, the Tiger will be safetied and on the road (it cost $90 a year more than the Concours to insure), and I'll enjoy having an operational, trustworthy machine made in the same place I was with lots of life left in it.  The fact that it was getting me thumbs up and one guy stopping to say what a nice bike it was when it was on the trailer on the way home doesn't hurt either.  Riding a tiger has a certain magic to it.

When I want to turn a wrench I'll work on the XS, getting it rolling again for the first time in years.  I'll get the ownership sorted on it (affidavits are required!) and eventually sell it without losing a penny, and then I'll go looking for my next project bike.  Maybe a scrambler Versys, maybe an old Interceptor, maybe something I haven't thought of yet.

Time for some unbridled Tiger enthusiasm!

Tyger Tyger, burning bright, 
In the forests of the night; 
What immortal hand or eye, 
Could frame thy fearful symmetry?

In what distant deeps or skies. 
Burnt the fire of thine eyes?
On what wings dare he aspire?
What the hand, dare seize the fire?

And what shoulder, & what art,
Could twist the sinews of thy heart?
And when thy heart began to beat,
What dread hand? & what dread feet?

What the hammer? what the chain, 
In what furnace was thy brain?
What the anvil? what dread grasp, 
Dare its deadly terrors clasp! 

When the stars threw down their spears 
And water'd heaven with their tears: 
Did he smile his work to see?
Did he who made the Lamb make thee?

Tyger Tyger burning bright, 
In the forests of the night: 
What immortal hand or eye,
Dare frame thy fearful symmetry?

Triumph Tiger 955i Engine Remapping

There are a number of posts on this blog about working out the kinks in my 2003 Triumph Tiger 955i,

and this is another one.  I've been playing with the Tuneboy engine management software that came with the bike, which works well, is put together well and is easy to use.  In working with the Tuneboy kit I discovered TUNEECU, a more open-source option for programming your own engine maps.

If you've never wrapped your head around engine maps, they're not very complicated.  Tuneboy does a good job of explaining how it works in their primer that comes with their software.

Back in the day you had a carburetor that used screws and jets to set the amount of fuel that got metered into the engine.   If you changed altitude you had to start swapping hard parts (usually the jets that sprayed fuel) to keep the bike running right, and sooner than later you had to manually trim the whole thing to keep it running right.  Electronic fuel injection took that all away.  A computer under the passenger seat on the Tiger takes inputs from sensors in the air-box (barometric pressure), in each of the three injectors , the fuel pump, radiator (engine temperature) and a crankcase sensor to constantly adjust things to use the most effective amount of fuel to make the bike go.  Put another way, carburetors are a mechanical, low resolution solution to feeding fuel into an engine.  Electronic fuel injection is a responsive, high resolution fix to the problem of delivering the right amount of fuel to a motor.

Tuneboy map editor - you can change settings and tell
the ECU (electronic control unit) what to do under
certain circumstances.

A fuel map is a spreadsheet of numbers.  Sensors feed the computer what RPM the engine is turning at and how much throttle is being asked for and based on the number in the fuel map, the computer delivers a set amount of fuel.  The 'fuel map' is literally a map that directs the computer to deliver a set amount of fuel.  If you're at high RPM and have just shut off the throttle, a smart EFI system will cut fuel delivery entirely, saving both fuel and emissions, something a carb couldn't manage.  If you suddenly give the bike a handful of throttle at low RPM, the map will direct the fuel injectors to deliver an optimal amount of fuel as it picks up speed, whereas a carb will always just send a mechanically set amount of fuel based only on how much wrist you're giving it.

In Tuneboy's system, you can change fueling and ignition maps, and modify things like idle speeds. The issue has been that the only maps I can find for Tuneboy are the stock ones from Triumph, which were set up to favour fuel economy and emissions over smoothness and drive-ability.  Meanwhile, TUNEECU (if you can navigate their 90's style web design and atrocious apostrophe use) offers you modified tunes that can smooth out your lumpy OEM map.

Of special interest to me were custom edits that made the list and have been on there for 9 years.  I don't know who Deano from South Africa/SA_Rider is, but they know their stuff.  The map on there does wonders for your Tiger's smoothness and pickup.  It might use a bit more fuel if you're heavy handed, but the difference in motor operation is impressive and worth it.

I was unable to find a digital tool to transpose the HEX files from TuneECU into my Tuneboy DAT format, so I opened up the modified HEX file and transposed the numbers over to the Default Tuneboy 10120 Triumph engine map and resaved it.  You can find that modified Tuneboy DAT file with the TuneECU South African mode here.

Finding this stuff isn't easy, and it's only getting harder as these old bike recede into the past, so I'm hoping this post help you find what you need to get your Tiger purring again.  It did wonders for mine.

Even though the old vacuum pipes held vacuum, I swapped them out for some similarly sized clear fuel line I had (you can see them going from above each injector to the idle stepper motor.  The TUNEboy software also comes with a diagnostics tool (with very cool 90s graphics!) that lets you test the radiator fan, idle stepper motor (which moves up and down modulating the vacuum in that black thing to the left/bottom in the picture) and the RPM gauge.

LINKS

You can find TUNEboy here:  https://www.tuneboy.com.au/

It comes with a cable that'll connect to your Triumph and is easy to get going, and comes with all the stock tunes.  It also lets you tune on a dyno, if you're minted.  It ain't cheap, but the minted guy who bought my bike new was, so he sprung for it and I'm still enjoying his largess over a decade later.

TuneECU can be found here:  https://www.tuneecu.net/TuneECU_En/links.html  Try to get past the out of control apostrophe use - they're better at software than they are at the speaking English goodly.

The older version is free, but finicky with Windows' old serial port drivers.  You can buy the app on the Android store for fifteen bucks, which seems perfectly reasonable.  You can then connect via bluetooth from a phone or Google tablet, though I understand you miss some connectivity that way.

It gets tricky these days finding the On Board Diagnostics (OBD) serial cable you need to connect the bike to the PC.  You can buy 'em from the UK, where people like fixing things.  CJ Designs in Wisconsin will sort you out with one too:  https://cjdesignsllc.com/?s=TuneECU

The modded engine maps for Triumphs on TuneECU can be found here: https://www.tuneecu.net/Custom_Tune_list.html

The TuneECU page goes into detail about how you might use the TUNEboy cable, but it requires so much messing around with knocking default Windows drivers out of the way and forcing others on that I wouldn't bother (I didn't).

Icy Days & Carburetors

It's been ice-storm icy here

Without warm weather beckoning (we've been in the middle of an ice-storm here) I'm in less of a panic about not having a bike to ride.  With an extended long weekend thanks to power failures and such, I've been hammering through four carb rebuilds.

The K&L kit I got came with a new bowl gasket, new pilot jet, washer and o-ring, and a new float jet.  Breaking down each carburetor one at a time (so I don't mix up parts), I cleaned out the carbs and blew them out with compressed air and then put them back together with the new parts.

Those little rubber bits
get crusty after 22 years
on a bike...

Adjustment wise I reset the float height (17mms with the float unweighted - held sideways).  I also reset the pilot jets to two turns out from snug.  The pilot jets varied from almost five turns out to under three turns out.  I'm curious to see how this affects fueling.  The manual suggested resetting them to what they were, and I did record them, but the factory setting is 2 turns from snug, so that's what I reset them to.  I'm not sure why I'd reset them to what they were when they weren't working well.

The carb rebuilds weren't particularly difficult, but they were a bit tedious (you're basically doing the same thing four times).  Things have ground to a halt again as I've found that I need o-rings to replace the old, broken ones that sealed the fuel lines between carbs.  With some new o-rings I should be good to put them all back together again and re-vacuum tube them with new tubing.

Rebuilding the first carb - it took a bit longer as it was more exploratory

The second videos hows the final two carbs and then discovering the need for o-rings -both videos are based on photos taken every 10 seconds compressed into a video running at one photo every 1/10th of second.

As an aside, I thought it would be a good idea to go through Motorcyclesuperstore.ca, but they seem to have pulled back from offering Canadian customers a clear view of their prices.  You used to be able to buy in Canadian dollars and there were no surprises.  When you buy now they charge in U$D, so you've got to do some math to figure out how they compare to Canadian retailers.  It looked like they came out about twenty bucks ahead of an equivalent Canadian order, until I got the COD message with border taxes.  Suddenly that twenty bucks turned into paying an extra ten.  I liked motorcyclesuperstore.com, their customer service went above and beyond, but their lack of clarity around pricing of orders to Canada puts them in the same category as any other US distributor.  I'm not happy with canadasmotorcycle.ca's 'easy' returns (they charge you for shipping), but I'm not playing roulette with customs costs again.  I'm afraid that's the last time I'll use motorcyclesuperstore.  I need to start looking into other Canadian based motorcycle retailers.

Two down, two to go...

The pilot jet (centre) - has a spring, washer and o-ring underneath.

The float bowl off and being cleaned out - the floats are held in a pin at the bottom - the float jet hooks on a tab in the middle

Carb Photos:
https://goo.gl/photos/kPhLXuQnb8HmdQFs9