Hi guys!
I'm new for this site and I read all of this project. Cool stuff! So I try some parts on my KZ650LTD. It is GSXR front end, bolt rite on like its made for it. In back some Ninja swing arm and it need bushing bore bolt and about 1/4" spacers on sides, between frame and swing arm. Than going to weld tabs on sides for two shocks which going to be from ZRX. Gas tank of Yamaha XS750 and seat I just steak on of different project, I thinking mo Kawasaki classic race tail or find one more gas tank and cut of part of it and use for stub.


Any suggestions, word of advise and criticism welcome!

Thank you guys!

Patton wrote:

Voxa_33 wrote: Hi guys!
I'm new for this site and I read all of this project. Cool stuff! So I try some parts on my KZ650LTD. It is GSXR front end, bolt rite on like its made for it. In back some Ninja swing arm and it need bushing bore bolt and about 1/4" spacers on sides, between frame and swing arm. Than going to weld tabs on sides for two shocks which going to be from ZRX.

Hello, Voxa_33, and WELCOME to KZrider!

But your interesting project's likely to get lost mingled here in D.Nel928's thread.

Would recommend starting a new topic for your KZ650LTD, which should elicit more and better responses.

Good Fortune!

patton you need to take this bike to the chrome shop.

Voxa_33 wrote: Hi guys!
I'm new for this site and I read all of this project. Cool stuff! So I try some parts on my KZ650LTD. It is GSXR front end, bolt rite on like its made for it. In back some Ninja swing arm and it need bushing bore bolt and about 1/4" spacers on sides, between frame and swing arm. Than going to weld tabs on sides for two shocks which going to be from ZRX.

Hello, Voxa_33, and WELCOME to KZrider!

But your interesting project's likely to get lost mingled here in D.Nel928's thread.

Would recommend starting a new topic for your KZ650LTD, which should elicit more and better responses.

Good Fortune!

Hi guys!
I'm new for this site and I read all of this project. Cool stuff! So I try some parts on my KZ650LTD. It is GSXR front end, bolt rite on like its made for it. In back some Ninja swing arm and it need bushing bore bolt and about 1/4" spacers on sides, between frame and swing arm. Than going to weld tabs on sides for two shocks which going to be from ZRX.

baldy110 wrote: I installed a modified GPz1100 engine into an 1982 GPz750 frame, pretty much the same frame as the KZ650. I did not brace it anywhere. I did install a ZRX swingarm and shocks but other than that the frame is pretty stock. The bike handles really well and is not flexy. I ride it really hard in the twisties and have not had a problem with it. Now if I was going to race the bike on a track I would probably brace it due to the higher speeds. On the street and at street speeds I would say no bracing needed. Now I don't know if the KZ650 frame is any stiffer than an early KZ900.

That gpz frame is far stronger than a stock kz900 frame,especially in the backbone and steering head area. :laugh:

I installed a modified GPz1100 engine into an 1982 GPz750 frame, pretty much the same frame as the KZ650. I did not brace it anywhere. I did install a ZRX swingarm and shocks but other than that the frame is pretty stock. The bike handles really well and is not flexy. I ride it really hard in the twisties and have not had a problem with it. Now if I was going to race the bike on a track I would probably brace it due to the higher speeds. On the street and at street speeds I would say no bracing needed. Now I don't know if the KZ650 frame is any stiffer than an early KZ900.

I used ZRX1100 shocks, don't know what year but I think they're the same. Lots of info on ZRX riders forum. I put them on my Z1-B, they fit the studs fine. But the left shock needed to be spaced out with a couple flat washers for chain clearance. I also trimmed the chain guard, but probably could have just used flat washers. The 1100 shocks are 14.25" eye to eye. A little longer than stock Z1 shocks, but I did a mod I found on ZRX forum. I lucked out and found the pair on Ebay for $120.

The $100 Niche shocks have ZERO DAMPING. They are just a tight wound pogo stick. They look good, but ride like crap.



To shorten




I've seen Z1/KZ's with ZRX shocks mounted upside down, but I don't like that look.

What year ZRX did you get the shocks from? What was their eye-to-eye length?

I appreciate the feedback on the NCS shocks too. Could you elaborate a bit more on how they're garbage? Just curious...

The Niche repros are garbage as far as performance goes. Do ZRX shocks fit your bike? That's what I replaced my Niche shocks with.

82 GPZ750, with a 1135cc engine. Rear swingarm and shocks from a 2000 ZRX1100, front end is a stock 81 GPZ1100 with a fork brace and progressive suspension fork springs. Thing handles really well.