ZRX KYB's on 1980 Z1R

Hey guys, long time no post. The Z1R project is finally back to life (had to put things on hold for a bit as I searched for parts and, oh yeah, had a baby!)

Have almost everything sorted, and about a full weekend's worth of reassembly prior to a test ride, but ran into a not-so-little hiccup with my plan to fit shocks from a ZRX onto the 'Ol Girl. The fitment is surprising perfect, but ran into a spacing issue on the drivetrain side. When mounted, the left shock is about 1/8" too close to the chain. The bottom 2 shock coils will rub.

I really want to keep the stock swingarm without cutting or welding. Is there any way I can get the bottom mount 'spread' to allow me to shim it?

Any suggestions or other ideas?

Thanks in advance - Mike

can you mill some material off of the eye on the bottom of the shock?

leon

hmm... Maybe mill the outside and shim the inside to space it away from the chain...?

May consider that.

thats what i'm talkin about.

leon

520 chain may help also

I did think about a 530 or 520, but then I would have to deal with offset sprockets, gearing ratio calculations and whatnot, right?

shouldnt have to deal with offsets,but you would have to deal with re-calculating the gear ratio.i love my 520 conversion.

leon

OK Leon,
Now I am interested, would you mind sharing some info on your conversion?
Sprockets used?
Gearing?
Chain of choice?

i did have to go with an offset countershaft sprocket because i am running a 190mm(200mm at first)rear tire.i fab my own countershaft sprockets(3/8's offset).i have a pmfr rear sprocket that fits the r1 rear wheel.i am running an rk x-ring chain and 18/36 gearing.

leon

Dennis Kirk has a kit thats how I did mine . I run a 530 mvx o ring x ring chain and love it !

My chain wasnt cheep lol but I guess you get what you pay for. the sprokits bolt right on and i think the front had a shim or somethin . if you go to there site they are great about sendin a catolog. metric 2010

MADesign wrote:

I did think about a 530 or 520, but then I would have to deal with offset sprockets, gearing ratio calculations and whatnot, right?

If your bike has the stock arm and rear tire it's real easy. Z1 Enterprises has the sprockets and chain and a guide on the 530 conversion to calculate your ratio:

www.z1enterprises.com/catalog.aspx?pid=KZ1000-D3-1980-MP1

another option may be a reverse offset rear sprocket. this will move the chain away from the shock and towards the tire. u will have to do some research to find 1 but they are out there. this will only get u about 1/16" unless u get 1 cusom made.Leon may be able to help u there.
look at this example of a kz1000 525 chain this will give u an idea. if u search this data u may find what u need. just referance the hole spacing and spline. or call them for advice. u may be able to mill the sprocket hub as another option. thats what i did to my zrx12 hub.
www.jtsprockets.com/52.0.html?&L=0&sel_uid=1156&p=