1975 KZ 900 , ZRX Swingarm, 89 GSXR front end

Yes, the 750 forks were about 1 inch shorter. Now on the 1990 model I am not certain, but I think it is the same. The 1100 had the clip on's mounted above the top clamp, so the fork tubes were just a little longer.

I started with 750 tubes, then found 1100 tubes (fork). If you already have a 750 donor bike, I would use the 750 forks, and keep looking for a longer set. They are identical other than length. this is of course assuming the 750 forks you have are actually shorter than the 1100 forks.

The "Bandit" series has the longest set of forks out there, and they are near identical to the early GSXR forks. Same diameter.

Use the forks you have to mock up the bike, while searching for longer ones.

There are a few guys on the forum who make triple clamps for other members. I cannot think of the names right now. You can also put an offset in the lower clamp, to raise the bike an inch. It is more expensive, the machine work is not cheap.

This fork, GSXR 1100

Gives me about

4 and one half inches ground clearance at the lowest part of the header.

THANKS ........I measured my original KZ fork and measeures 29" from centre axle to top of triple clamp so this is the dimension I will be looking for. I haven't got the GSXR parts bike home yet to measure the forks.

FYI- Hayabusa USD forks are 30" long.

Great looking bike you have there...

Couple questions

what's length on the rear shocks?
are those 17" wheels?

Rear shocks:

fully extended 13.5" center to center eye to eye.

Yes they are 17 inch wheels, Front from an early 90's GSXR, rear from a 99 ZRX 1100.

Thank you for the compliment, you appear to be from Seattle, I was living in Wenatchee until 2007.

Yeah, I'm in Seattle. Thanks for the info. I'm thinking of putting a ZRX swing arm on my kz900 but can't afford to do the whole thing right now so I'm gathering info and looking for parts. I haven't found anybody local that's done this yet. Pretty clean upgrade that shares the lineage of the Z bikes.

tk11b40 wrote: This is a great idea, except for the copywrite problem.

The points cover, would be easy to make, 1 lathe Op, 1 mill op. I just need a different Logo.

I will look into this, the part is possible.

y

The KZR logo would me a bitch'n points cover. I have also considered cutting out the center and putting plexiglass in the center with some LED back lighting.

tk11b40 wrote: Rear shocks:

fully extended 13.5" center to center eye to eye.

Yes they are 17 inch wheels, Front from an early 90's GSXR, rear from a 99 ZRX 1100.

Thank you for the compliment, you appear to be from Seattle, I was living in Wenatchee until 2007.

When you are ready just hit me up. I can walk you through the swingarm switch. The 99 ZRX fits right in. Then there is the chain alignment, and the front and rear wheel alignment.

Its all do-able.

Cool thanks man. Unread skittle but of this thread and saw that aligning all that stuff can be a challenge but it's good for me somebody already did it.

might be just rehashing this, But i have a 96 GSXR 750 F.I. Srad sitting in the garage now that has no spark and because it was a totaled bike but is rebuilt almost. makes me wonder how tough it would be to put it on the frame of my KZ750 that is a 79. the gsxr is pretty much complete other then the head light and the right side clutch controls .
but i have seen several on here that have changed the rear swing arms from the early gsxrs to the KZ.

can you let me know if you have build thread on your bike? ya have me thinking of doing something like this instead of the fight for a title etc... on a totaled bike. besides i got the whole thing for 300.00 because of the no spark issue so tearing it apart might be even more fun then trying to rebuild it

Its always easier if you have both the GSXR and the KZ in the garage side by side.

I did not have that luxury so that you can compare measurements easily. I do have a good friend with a ZRX so we did a great deal of measuring before we started the swing arm swap.

I have seen a few KZ's with the Gixxer motor installed, it seems to look reasonable. Winter is coming it is time to start on the KZ project again. Ten years now I have been working on this thing.