front sprocket sizes

Well thts a bummer. Can you get some sprockets and chain in the conversion size, like 530 or 520 and set it up for a ratio you feel would be better? Z1 could answer such questions I'm sure. Might be close to $200 with shipping, but might be a better fit around the counter shaft.
Wouldn't that bike have run a 530 chain from Kawasaki?

Godfrey wrote: Well the books I have say 5th gear in the 650 is .89 and in the 750 .87 so not enough to make that much difference; the speedo could be off, and or the clutch could be slipping I suppose, not sure(not sayin it can't happen)I've ever heard of a mechanical tach bein off. Regardless, I put the 13 tooth sprocket back in and put it all back together, there doesn't look to be enough room for anything bigger.If I pursue this any further I will have to focus on a custom rear sprocket.

How about a 6 Speed from a 550? As well as a sprocket ratio change? Keep the low speed take off and get a cruising RPM?