nice bikes bob;)

An alternative to a GXSR swingarm is a Bandit 1200 swingarm.

I got an excellent '97 Bandit 1200 swingarm for $60.00 with shipping on ebay. This swingarm is narrower at the frame/pivot area than the stock KZ1000 swingarm, so only shims were needed, plus a long spacer to take up the 4 mm difference between the 20 mm Bandit 1200 bearing/internal spacer/pivot bolt and the stock KZ1000 16 mm pivot bolt. I'm fitting this Bandit 1200 swingarm to a '78 KZ1000 project bike's frame. Will weld up some PMC twin shock mounts to the Bandit 1200 swingarm and fit a pair of ZRX1100/1200 rear shocks.

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Post edited by: jcleach, at: 2006/09/23 19:40

Post edited by: jcleach, at: 2006/09/23 19:42

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Post edited by: jcleach, at: 2006/09/23 19:36

I considered putting a 180 mm X 17" rear tire on my '73 Z1-900 with a '82 GS1100 swingarm. But I stuck with an Avon 160 X 17" rear tire that's actually 166 mm wide. I did not use an offset countershaft sprocket. But I had to use offset spacers (1.25 mm) on the countershaft sprocket and on the rear sprocket. See my link to this project for some pictures. My rear wheel is centered in my '82 GS1100 swingarm by the way.

To fit a 180 X 17" rear tire, I would have had to use an offset sprocket (10 mm) and an offset spacer (10 mm) on the rear sprocket (which I have by the way). With this setup, the chain will come very close to the frame and I would have had to cut some of the bottom stud/bolt that supports the stock left footpeg to clear the chain. You would have had to cut away the inside of the countershaft cover to clear the countershaft sprocket and chain. Also, I would have had to use a somewhat longer chain in order to have the 180 mm tire clear the front of the GS1100 swingarm. Hope this helps give you an idea of what's involved.

I have a 2005 gsx1000r swing on a 74 z1 pretty easy w/minor machining of bushings for pivot and shock mount fab. completed yesterday and I was amazed how simple it actually fit. Oh yeah, i had to remove the triangulated pass peg and muffler bracket.
Late model gsxr's (late 90's ond up) all share mounting dimentions.600r-1300r. different models may have different styles (bracing and so forth) the SRAD models and others without bracing require less work and may allow you to retain pass. pegs, I didnot want them.
the stock pivot pin on my z1 measured 0.6175. machine bronze stock to an outer diameter 0f 29.85mm, this will allow you to knock out the inner sleeve, exposing the bearing on the gsxr arm, and drop it inplace, replace the retainer cap and go. Do not forget to leave a collar on the bushings to prevent them from falling in.
Ileft one 3/16" thich on both sides and eliminated the need for shims all together.I will barrow a digi cam and get some shots. until then, I found these pics on this site, it is a twin but still yeilds useful info a very coll bike in the making!!!
bike build and pics originally posted by jornum1
thanks man

Post edited by: jcleach, at: 2006/09/23 19:32

Post edited by: jcleach, at: 2006/09/23 19:43

Post edited by: jcleach, at: 2006/09/23 19:50

I spent all day yesterday in the machine shop making my bushings and rearsets. Bolted the rearsets up and fell in love, amazing what you can do with a few hours, a bandsaw, a mill, an engine lathe, and a couple pieces of alluminum and bronze stock! Jeff at allballs racing gave me the bearing specs to the hundredth of a millimeter. My swingarm came in today and presto!they fit beautifully. I knocked out the inside sleeve and replaced it with my bushing , retaining the bearings.
As for the axle, my bushings were perfect as well, but my axle is 1.5" too short. oops! Heading to the local bolt shop in the morning, then to salvage if not there.
Any suggestions on axle applications?:S

I ran into the same situation with the front end on my KZ 900. Here is what i did. I took the larger axel and had it bored out to accept the smaller axel this way i don't have to mess with trying to get custom bearings made which i too could not find anyone to make. It worked great for my front end. The only thing i caution you with is not to have the axel bored out too much. The inner axel needs to fit snug without any slop.

Hope this helps.

tw

bushings like z1 swingarm used in place of bearings in gsxr arm.just need to find same o.d as stock bearing cages in swingarm and same i.d as z1 swingarm pivot or smaller and have them reamed to z1 size after installing bushings in swingarm.make sure to add grease zerk to swingarm pivot