TOPIC:

That is exactly how i figured out my rear end.my front end must be off center. i took great pains to line up the rear to the front,now the rear looks off center. but it handels great.(for a KZ).
I used a 5/8" offset and had to heat inside the frame with a torch and squeese it flat with a c clamp. also had to grind the inside footpeg mount off. its fine now.
From what ive read,the concensous is that a 520 chain isnt strong enough.

The 1000cc superbikes use 520 chains, so there is no doubt that they'll stand up to a 200 hp bike. However the racers that use those chains change them on a pretty frequent schedule. Having said all that I'd have to recommend the 530 instead for it's longer life, and the comfort of being able to ignore it. The weight loss of the smaller chain and sprockets is significant if your bike doesn't weigh the same as a KZ. Since we are talking KZ's and not modern aluminum framed race bikes the weight loss is unimportant and the longevity of the heavier change is more important. All IMHO.

That scooter has seen speeds that I wouldn't have believed if I weren't the idiot riding it. I can't remember a lot of the handling and jumping characteristics of it though, as there was tequila involved at that point. Troy341

Hey thanks for the specs and drawing. I was a little worried about finding a machine shop to work on the cush drive. (or understand what I was talking about)
I think I would rather run a 630 chain. This bike is heavy and makes torgue like, RIGHT NOW!
Thanks again.

i have been running the 520 non o-ring chain since i converted my z1r over to the r1 rear wheel tire and brake.i ride harder than most around me and always have.i haven't experienced any more excessive chain strectching than i did with my old skinny 120 tire and a 630.i just purchased a new o-ring 520 because i am fixing to build me another offset countershaft sprocket in an 18 tooth to get my gearing back to where i want it.i won't stop with the 520 because it works for me.that's my .02 fwiw.
here is the bike i speak of.

leon holmes

tk11b40 wrote:

Then just have a buddy help you ease the frame over the engine, it's even much easier to get the mounting bolts in, as there is almost no load on the frame.

i always lay the motor on a blanket and drop the frame down over it

tk11b40 wrote:

The 2005 photo, is after powdercoating it the first time. We tig welded a Kosman gusset kit in. I had decided against teh zrx swingarm in favor of a GSXR 600 swingarm. The 600 swingarm fits right into the frame no sweat.

Well My buddy has a zrx so we took his swingarm out and the rear wheel, put it under the frame, and man it looked good.

So I had to cut the stock bushing sout, and weld in new frame bushings. This was all done with a series of fixtures a good friend of mine helped to build. He is known only as the "Wizard". Very very good at what he does. We welded in the new bushings in perfect alignment.

Next we were concerned the super stiff swing arm would transfer flex into the rear of the frame. Fabricated more gusstting and welded it all in, soking Powdercoat 1 in the process.

i like the way you did the rear shock and fender mount bracing ive been scrating my head about how to beef up that area!B)i was thinking about putting a cross brace just ahead of where you did yours where the down tubes and top tubes meet just ahead of shock gusset areaB)

531blackbanshee wrote:

i have been running the 520 non o-ring chain since i converted my z1r over to the r1 rear wheel tire and brake.i ride harder than most around me and always have.i haven't experienced any more excessive chain strectching than i did with my old skinny 120 tire and a 630.i just purchased a new o-ring 520 because i am fixing to build me another offset countershaft sprocket in an 18 tooth to get my gearing back to where i want it.i won't stop with the 520 because it works for me.that's my .02 fwiw.
here is the bike i speak of.

leon holmes

Leon that Z1-R is flippin' gorgeous. A set of usd forks and an R1 front wheel would put it right over the top, IMHO. Is that a ZRX swinger? I can't tell, it looks a little stretched too. Again, well done. Troy341

tk11b40 wrote:

The frame:

I keep goimg back to the frame cause it makes me so proud. All the welds have been ground to fillets making a smooth looking "sculpture".

This is the view from the front:

341,thanks for the compliments.i actually have a zx12 frontend(thanks mark1122)that i will use on this bike.it will be a winter project as i missed out on some riding last spring when i was building the swingarm in question.there are a bunch of pictures in the projects under "my 1980 z1r and 900 projects".i do still need a r1 front wheel tho if you know of any.i built the swingarm out of 1" .065 wall 4130 cro-mo.and milled the axle plates out of a chunk of steel then tigged it all up.it is much more stable in mid corner bumps now.


leon holmes

531blackbanshee wrote:

341,thanks for the compliments.i actually have a zx12 frontend(thanks mark1122)that i will use on this bike.it will be a winter project as i missed out on some riding last spring when i was building the swingarm in question.there are a bunch of pictures in the projects under "my 1980 z1r and 900 projects".i do still need a r1 front wheel tho if you know of any.i built the swingarm out of 1" .065 wall 4130 cro-mo.and milled the axle plates out of a chunk of steel then tigged it all up.it is much more stable in mid corner bumps now.

leon holmes

just as soon as my foot is 100% again ill be ready to have you start on my swingarm Leon,im getting close!

i know just as soon as your foot heals the ol impeller will start spining again:woohoo: .

leon holmes

531 blackbanshee,

I salute your swingarm, that is some nice work!!

The bike is fantastic, the Z1R the ultimate KZ. Very nice.

Plummer,

interesting gusset work. more "curvy". I wish I had looked at this forum when I started the project for more ideas.

I prefer more geometric shapes, but can appreciate what you are going for there.

It is so cool to see so many other people working over the KZ. I tell my wife all the time "what the 1957 Chev Bel Air is to hot rodders the KZ is to motorcylists".

341 has a very interesting Honda 160; he should spot a photo, it's not a KZ but it is super cool!!