1980 KZ750H Modern Cafe Project

Just picked up a 81 750. How hard was it to get that swing arm to fit? What kind of modifications do you have to do the get the chain to line up and correct gear ratio?

Hey, The 04-05 GSXR 600 swingarm will fit inside the mounting tabs, but a spacer will need to be made to match outer diameter of frame bolt to the inner diameter of the swingarm bearings. A few spacers will also need to be made to shim out the inside space between the frame. As for the sprockets I went with a 5/8th offset 530 sprocket from Precision Metal Fab . That pushed out the chain enough to line up with the rear sprocket which I swapped off a 04 GSXR1000 in 530 46T. The 600 is way too small and in 520 which precision does not make. So chain rubbed on lower and upper mounts just a bit. Zipped some lines and punched about an 1/8 of distance out of the innner curves of the frame rails. I will plate the upper one and just finish weld the other. Based on where you want the suspension to sit you may have to fab up a lower chain roller to keep the chain from bottoming out on the lower frame rail. It's coming along. As for the ratio I played with it and came up with this setting. I hope it puts out a good midline performer. I included a ratio chart if you want to do your own. I hope to have it running this spring then it all comes apart again to finish.

Will a 05 750 fit ?

As far as I know the 750 has different dimensions, but I am not completely sure. Thanks

cool project!

love the vision,keep us posted

leon

That looks really good. Would like to see what your ratio chart looks like. I'm working on a 84' 700 myself.

Well, a lot of work has been done over the past couple of months. First start to come today. What we have so far.... 1980 kz750 doner bike, 02 zx7 forks and front wheel, 04 gsxr600 swingarm, rear wheel, and brake set up, 06 cbr600rr taillight and front fender, vrod headlight, 2011 gsxr rear seat cowl with fabricated undertail, and a 1973 honda cb350F petrol tank. That's just the basics. I plan to work out the kinks then tear it back down to complete body work. If anyone is interested in the details I can start a new topic.

It looking good! what's the rest of the plan?

Just a caution note on clip-ons: Yesterday going to St. Augustine for the Riding Into History bike show, my friend, who had just put his Honda café project on the road, cranked up and his left clip-on broke in two and came off in his hand! We'd just came off a screaming ride up the road when we stopped for gas. Had the clip-on failed at speed, he very well may not be with us today.
Buy the best to stake you life on.
The weld where the bar came apart looked like aluminum. The two pieces appeared to be joined at areas that were smooth and about the size of a dime. Dunno the brand, but I can likely find out.
Ride safe,
Steven

Well, It has taken awhile, but it is finally ready to tear it up for a couple of months. Then she will come apart for her lyme disease tribute theme. Dark, evil, bio warfare look. Can't wait.