Concours Carburetors: Prepping for rebuild

There are three rails holding the four carbs together on a Kawasaki ZG1000 Concours.  Two of them are structural and the other one holds the choke mechanism in place.  Taking them off a twenty two year old carburetor can be trying.  I ended up having to cut a line in one of the retaining bolts and put some heat on it to get it to let go, but all three pieces are out now.

With the four carbs separated I'm now waiting on the rebuild kits.  When they arrive I'll rebuild each carb one at a time (so I don't mix up parts).  All four carbs are cleaned up (a touch of carb cleaner and a toothbrush got 22 years of grime off) and awaiting some new gaskets, float adjusting and rebuilding.  While in there I'll make sure the needles are in good shape and everything has the right geometry.

The first one will be exploratory and slow, by the fourth one I'll be able to rebuild these things in my sleep!

The four carbs separated and cleaned.   Taking a twenty two year old carb apart takes some patience, and some heat.

Cleaned up and ready for a rebuild.

No lost parts this time - everything labelled and organized.

The choke rod (up and down to the right) partially removed - each carb
links to this plate which moves them all when the choke is pulled.

It only takes a bit of carb cleaner and a tooth brush to get the crud off. I blew it dry with the air line afterwards.
Caustic carb cleaner (it melted two pairs of latex gloves - for goodness sake, wear gloves!) isn't recommended on the insides
- I'll use a bit of gas and a clean toothbrush to make sure the innards are perfect when I get in there.

Some Kawasaki Concours ZG1000 carburetor links:

https://snapguide.com/guides/rebuild-kawasaki-concourse-carbs/
https://sites.google.com/site/shoodabenengineering/intake-and-exhaust
http://www.murphskits.com/product_info.php?products_id=130
http://www.randols.net/Connie/#_Toc276312906

Dream Racer

Triumph included a link to this on their email newsletter, so I gave it a whirl on Vimeo.  At nearly $9 it's an expensive (48 hour) video rental compounded by some stuttering even with fibre at home internet.  Looking at the code it looks like Vimeo segments the video to prevent copying.  Those segments kept stalling on transition, which is pretty frustrating, especially when you just paid a premium price to see it.

I like Charley, but he
wasn't the guy to see
this through

Technicalities aside, the film itself is very engaging.  It isn't just about a run at Dakar (like Charlie's was).  The man making the film, Simon Lee, is in his thirties and feels like his dreams of making a film are ebbing away under the pressures of middle aged life.  The man trying to go to the Dakar, Christophe, is a former North African motor-cross champion who failed to complete the Dakar the year before.  He is a skilled rider, but spends all his time in a suit and tie doing business and trying to drum up the money to get himself to the race.  The expectations of middle-aged life are barriers in both men's struggles.

When desire conquerors
circumstance you get a
better story

You'd expect a fully financed, technically supported, off-road experienced forty year old rider coupled with a Dakar veteran mentor and a spare rider to hand you his bike when your's breaks to finish the race (he didn't).  You'd not expect a single thirty-something experienced racer who has to turn his own wrenches and barely managed to find a bike and get enough money to attend the race to finish (he does).  What matters more, financial support or the will to succeed?  This film sheds light on that question.

Along the way you get to see the Dakar without the money lenses of sponsorship.  This purer Dakar hearkens back to the beginnings of the race (a good documentary to watch about this is BBC's Madness in the Desert).  But you don't have to suffer through poor footage from amateurs to see this raw Dakar.  What you get is video shot by a guy who knows how to shoot video and edited by an expert.  The whole thing is then wrapped in an original soundtrack that supports and nurtures the narrative.  If you're used to watching half-assed video of motorcycle based adventure, this isn't that.

A teary conclusion is well earned, and stirs up deeper
philosophical questions around media dilettantes & the
committed racer...  

When you get to the end and everyone is in tears you'd have to be a robot not to share that feeling with them, and it's not all just about Christophe's race either, it's also about Simon's journey as a documentary film maker.  Both men defy expectations and pursue a dream at great personal expense (emotional, physical and financial).  It's the kind of story most of us who live in a world that doesn't give a damn about what we dream of doing can relate to.

If you enjoy a quality, motorcycle themed film, this will do it for you.  It's well shot and brilliantly edited and musically scored.  The filming is such that you get to know Simon and Christophe who are both painfully honest in front of the camera.  The narrative (aided by that brilliant editing) takes you from introductions, to desperate attempts to source the money and prepare for the race and then tosses you into the Dakar without the antiseptic third person corporate perspective you usually see it from.  By this point you're emotionally invested in both men's journey.

I recommend this film.  I only wish I could have ordered the DVD for a few dollars more and been able to watch it without the interruptions and technical headaches.

When a film leverages the Dakar to raise questions around commitment to challenge through skill and determination,
and does it well, you've got a winner.

Christophe riding injured.  As long as he is conscious, he isn't going to stop - remarkably sympathetic to his machine as well.

A naked Dakar bike, personally paid for, no corporate spin; not what the modern Dakar is about.  It would be nice
to see the money around the Dakar put a bit aside to ease the entry of privateers into the race - they make for better
stories than the stone faced, well paid professionals.

An Adventurous, Versatile, Always-on Versys

Two bikes not being used...

With the ongoing frustrations with trying to run a 22 year old bike as my daily rider I'm thinking of rearranging things so that I have a more functional motorbike stable.  At the moment I've got a KLX250 that I don't throw a leg over very much and isn't a popular choice with my pillion.  I've also got the big old Yamaha project bike that isn't getting any attention because I'm spending all my garage time working on the Concours.  Rejigging things to have a more functional stable is on my mind.

I miss having I.T. on at least one bike - having an onboard computer means the bike will self regulate and run more consistently.  Being a computer teacher means I'm not really scared of digital tech either, so I'd welcome it back.

The process might look like this:  sell the KLX, get the XS1100 operational and sell it too, and sell  the little Yamaha my son has never ridden.  In a perfect world I'd bring in about $4000 with those bikes.

What I'd be looking for is a second bike that could do basic commuting duties including two-up, would run all the time, and could ride a wider range of roads than the Concours is comfortable on.  As a road tool the Concours takes some beating (when it works).  It'll tour two up comfortably with lots of room for luggage, cover highway miles with ease and makes for a surprisingly agile back road weapon when riding alone.  What it needs is a break from the demands of being an always on motorcycle (it's twenty-two years old!).

That always on motorcycle should be light with a fuel injected/modern engine.  Of course the Ninja was those things, though it was a very road focused machine as well.  Kawasaki makes the Versys, based on the same ER6 chassis as the Ninja but with an enduro riding position.  With a few tweaks that bike could become the light-weight all-rounder I'm looking for.  At only 180kg, the Versys 650 is a mighty light, very dependable bike.

Where would I find a Versys?  They're about.  There is a well cared for '07, albeit with pretty high kilometres, for under three thousand over in Kitchener.Starting there I could build out an adventure Versys.  There are a lot of people doing something similar...

A great thread to follow on an adventurous Versys

high/scrambler pipe inspiration

LINKS

http://www.topspeed.com/motorcycles/motorcycle-news/studio-motor-gives-us-the-kawasaki-versys-650-scrambler-ar169995/picture634237.html

http://bikebrewers.com/kawasaki-versys-650-scrambler-studio-motor/

http://advrider.com/index.php?threads/one-more-versys-adventure.1078100/#post-27148119

Pulling the Carbs

The Concours' carburetor has become cursed by demons.  These carbs tend to not come back from sitting very well, though last year they didn't have this problem.  When I put them away they were running well, but no longer.

Yesterday I pulled the tank again and went over the vacuum tubes in detail - no breaks, no problems.  After putting it all back together again I took it out and had the same hesitation on throttle and back firing.  The bike feels seriously down on power too.

I was hoping to send the carbs down to Shoodaben Engineering in Florida for a spa session with Steve.  His prices are more than fair, but after having an economist (whatever the hell that is) as a Prime Minister for eight years, Canada's dollar is in the toilet and my $500US carb repair would cost north of $800 with shipping, customs and the exchange rate.  I paid $800Cdn for the bike in the first place.

So I'm rebuilding carbs!

In spite the many terrifying stories of carb removal on a Concours, I found the process pretty straight forward (thanks to Steve's video).  Warm up the rubber on the airbox to carb, they get nice and soft, and you wiggle the whole thing free.  With the carb on the bench, parts are ordered ($200Cdn for 4 kits - 1 for each carb) and I'm beginning to break it down to rebuild each.

There is always one more thing...

The open road awaits, and it's still waiting...

Recent frustrations with the twenty two year old Concours had me saying yesterday, "I like doing mechanical work, but sometimes I just want to go ride a fucking motorcycle."  It was a day in the mid teens Celsius (almost 60 Fahrenheit), and the sound of motorcycle engines could be heard on distant roads.  After spending the winter redoing the brakes, wheels and bearings, I got the Concours back on its feet only to find the carburetor has gone off.  The bike is running lean, not fueling nicely and back-fires when coming off throttle.  Instead of going out for a ride on one of the first nice days of the year, I was popping and swearing my way up and down the road by my house trying to get the carb to play nice.

Some vacuum diagrams on there, but not where they go.  Another
suggestion for lean burning/back firing conditions (which I have) are
the air cut valve (highlighted).

Some research into Concours carbs produced a baffling array of opinion and vitriol.  It appears that no one who works at a dealership has the experience or time to do carbs properly any more, and the carbs on the Concours are fantastically complicated.

I've done carbs before on cars, and labyrinthine vacuum tubes aren't a problem when you have a diagram to follow, but Clymers doesn't include one in their manual (unless it's for California bikes), and the Kawasaki diagrams show bits of vacuum diagram spread across the valve head blowup, the carb blow up, the fuel tank blowup, air box blow up and others.  Needless to say, trying to chase vacuum connections across half a dozen diagrams isn't easy.

Today I'm taking the fairing I just put on back off, removing the gas tank (again) and trying to make sense of the vacuum tubes.  If nothing obvious presents itself it'll be time to remove the carbs and go deeper.  I just did something similar on the XS1100 in the fall.  I haven't had time to work on it since because I'm spending all my garage time on the Concours.

I'm starting to think one project bike is enough.  The other one needs to be modern, dependable and there when I need it so I can, sometimes, you know, just go ride a damned bike.

Sources for Concours carburetor and vacuum information:

As usual, CoG is the place to go first:
http://forum.cog-online.org/index.php?topic=27077.0
http://forum.cog-online.org/index.php?topic=38095.0
http://forum.cog-online.org/index.php/topic,11914.0.html

CoG wisdom on Concours carbs:
Normally it is caused by dirty carbs and and not being sync'd properly. The dirty part can be from just a few days of sitting due to the ethanol evaporating....

it's very likely during the "cleaning" they did not dissassemble the air-cut valves from the 2 carb bodies prior to spraying with volatile carb cleaner. internal to each of those housings is a very delicate diphragm, not unlike the ones that lift the slides....during this process they damaged them, and at the least, never cleaned the rod attached to those diphragms that during decell, when the diphragm moves, opens a port to add fuel to the intake tract to preclude/prevent a "lean burn popping" upon decell. That is the sole purpose of those 2 valves, when they don't function, you get this result.

Check the vacumn stuff like you already mentioned. I had a back fire for a while, peeked under the tank, found the rubber cap on the #3 carb was split. Just for the fun of it, replaced all the hoses while there, good to go now.

You Cannot do away with the reed valves entirely unless you tap the ports in the actual valve cover and thread in some set screws. The easier way here is to leave the reed valves and metal covers on the valve cover, and remove all the vacuum hosing associated with the pair valve. Go to your local auto parts store, and pick up three 5/8" "heater core block off caps". They look like big vacuum caps, and also some 3/16" regular vacuum caps. Using the 5/8" Cap off the 2 ports left on the valve cover, and insert one backwards into the airbox hole. Use the 3/16" to block the intake ports.

http://www.zggtr.org/index.php?topic=15181.0
http://www.justanswer.com/motorcycle/21eu0-1897-kawasaki-concours-looking-fuel.html