Understand that the KZ900s are worth some money stock. I don't tell anyone what to do with their bike. I mention this because often times the passenger pegs get in the way of a wider swing arm and need to be cut of. Once you start cutting the restore is out the window. Just my 2 cents. I'm not positive if the KZ900 is the same as the KZ1000 as far as the swing arm goes. if so the 89ish GSXR swing arm is a bolt on with some spacers. I am able to get a 170/60/17 on my 77KZ1000. Others here will chime in and get you some specific details.

Good luck!

Anybody have any updates on this project or Boostable? I am loving what he is doing especially the rear swingarm work which I am getting ready to do myself. I am getting a similar swingarm off of a 2005-6 GSXR 600 and want to know where he got those bushings. Are you out there yet Boost?

531blackbanshee wrote: looks like the offset counter shaft sprocket is wearing well :evil: !

leon

yep and so are the swingarm bushings. I have gained a ton of weight since I put this thing together and was a little concerned with the flex of the swingarm (side to side) but bushings show no wear and no play

I'm off today its supposed to be 70 degrees and I really would rather be riding than cleaning LOL
a day off and gorgeous weather is a really rare for me. time to get off the computer and make the most of it!!!

One more thing. I'm going to be using goldwing shocks. Will I need the the mounting hardware for the clevis joints on the lower end of the shocks from a Golwing or the gs 1100e?

Thanks again 650ED.

If any of you have done the gs1100e swingarm conversion I need some info. I doubt the factory chain will be long enough, how many links did you have on the new chain with the longer swingarm?

ok. so I guess ill have to use jackshaft swingarm and sprockets. I kind of figured that. thanks

royalratch wrote: Got some measurements to help select the right shock length as I want to order some new ones, possibly built to spec.

Here is the bike sat dead flat under its own weight - the changes from stock Z650 are 17" wheels, 06 ZX6R USD forks and pretty regular tyre profiles. The rear 'shock' plank length here is 300mm.

There are no Ohlins options for a Z650 and certainly not for a modified one - only for stock Z900/Z1/Z1000 and some 750s / 500s.

So, the Ohlins S36P KA140 is 350mm eye to eye. That's 50mm too long so allowing 25mm static sag (under bikes own weight) means it'll be jacked up 25mm at the rear. Can I dial that out by adding preload? Or is it too much?

Is a custom built set worth the bother?

Cheers all!

I run both my road racers very kicked up at the back to sharpen steering and add ground clearance, that means around +40-50mm (see pic). thing is that increases swingarm angle and you start running into issues with chain tension changing a lot during suspension travel and chain rubbing on the top of the swingarm .

The first problem is solvable by adding a tensioning wheel in the lower run (like buells have).
But if rubs on top unedr tension, not so good..... that petty much limits how long a shock you can fit. make 350mm "wooden shocks", temporally fit a chain and check if thats the situation. if it rubs then you could unscrew the adjusters, but not by that much.

Dont buy the shocks unless they are willing to fit springs with the right rate for your bike weight. z900/1000 rates are bound to be way stiff for ya and that CANT be fixed with the preload adjuster...

tk11b40 wrote: ...had the thing running several times, but each time something strange happens with the carbs, this seal or that needle, etc.
Gonna spend the money on new carbs, and 900 bucks is a lot, so the more info the better....

New carbs also have seals and needles, etc., that likely will sooner or later require some attention.

It's often the case that a set of carbs may be returned to serviceable condition, and perhaps at relatively small cost.

What's wrong with the carbs at hand?

Good Fortune!

Excellent feedback MORE MORE MORE !!

Thank you, I did not know they made noise at idle, and can see that making me nutty. I am not against the flat slides yet, especially if easier to tune.

This forum is so cool, almost anything you can think of has been done already by somebody on the forum. I finally have the title, and just need carbs, I have had the thing running several times, but each time something strange happens with the carbs, this seal or that needle, etc.
Gonna spend the money on new carbs, and 900 bucks is a lot, so the more info the better. I will read the comparison.

Thank you !!