I tried a GSXR750/1100 wheel with a 180 tyre in a GS1100 swingarm.No way would it fit.In any direction. For clearance at the front of the tyre,the wheel had to be so far back,there was no way to use the chain tensioner. To have the sprocket bolts not hitting by the shock mount,it had to be so far over to the right, you could fit a sidecar. If I was able to get it to fit,I would have needed a very offset front sprocket and a chunk cut out of the frame to get the chainline running straight and the wheel would still have been off center.
That was my experience. Dont know how others have managed it.
(I ended up going with a GSXR600 arm and a Bandit 600 wheel with a 160 tyre but I was going for a full on front/rear end conversion anyway)

BohicaBob wrote: See "Z1-900" in my signature for some information that might answer some of your questions.

BohicaBob I tried the links in your signature, only the KZ2 link worked....are they all still active? I'm not sure if it is something on my end...

Cut the old pivot shaft and made my bushings. PITA That little welder is a POS. I'll do a little clean up later. If nothing else I have templates to be copied. They'll work but I like Leon's top hats better.
Steve

z1kzonly I saw your gs swingarm back before christmas it was really nice! I wish I had the money at the time I would have been all over it. The one I got was cheap but it's gonna need a lot of work. That harley rim and tire looks massive! I can't believe that thing would fit. that's crazy.

NO 17" Old School will not let you in to the class room!
Stick with 18" you can go to a 180 tire with the GS swingarm.
But you will need a 5/8" offset or you can cheat with a 3/8" offset countershaft.
The 2 spacers you need are .160" thick if you machine them.
I always sell my stuff then regret it. I had this GS swing up before Christmas. Hope someone on the forum bought it.
And a few years ago I had this Harley that would have fit the GS. The tire was a 180.

I like my drum. It's unaffected by water. Going to a 17 might be a good idea but you're limited to how wide the arm is plus the brake stay arm as well. It's mighty close to the tire as is.
Steve

See "Z1-900" in my signature for some information that might answer some of your questions.

I know this subject has been beaten to death already, I just have a few questions. I have a 1976 KZ900 and I just got a fleabay gs1100 swingarm to do the swap. The KZ900 factory drum brake works fine, but I also have a KZ1000 rear end- hub with disc brake, all brake parts etc. I am leaning towards keeping the drum brake simply because I like the look. I'm not swapping the front end so I want to keep it all looking old school. Is there any reason I should swap to disc brake? I can't imagine it's really that much better in regular street riding. I'm also looking at lacing up a 17'' rim for bettertire options. Will a 5 or 5.5 inch wide 17 fit? I'd like to get a 180 if possible. Or should I find something in 18''?If so what's the largest that fits?Also that brings me to the problem of tires- anybody run a tubeless conversion? or tubes inside modern radial (tubeless) tires? I'm keeping the 19'' front so I guess I would have to find tires that came in the sizes I need... I know I'm asking a bunch of different stuff. I've tried searching for answers in other posts there just didn't seem to be one that covered everything. If anyone has experimented with different stuff I would love to hear about it.

The Irwin bit worked. Took my time, cut, oiled, removed over and over. In about 4". Plenty of depth. I'll able to adjust the nominal width of the bushings tomorrow. The bearings were all crusted up. Flushed with diesel and worked them until free. Have it filled with my chain saw gas to sit overnight then flush and work them again. Getting closer.
Steve

Could you make a sponsor for my drag race program so I ain't gotta pay for it ? :lol: :lol: :lol:
Oh and a boss that'll let me off work more to go race.

kidding aside the things I'd want would be drag related for my little bike and that isn't a huge market
very few folk's are racing the old 650/750 bike's though I've seen on some F/B page's guy's asking about
longer swing arm's and monoshock kit's.

I have been thinking about a new arm I want a cromo arm that would go from 8" to 12"
set up to hold air.