Fancy title. If someone has a 650 bottom end apart would you verify the teeth on the crank sprocket and the primary shaft damper sprocket please. The sprockets the primary chain runs on. ( ie crank should be 24T and damper gear 28T...same as the 550.
Thanks
Got to be the same - 24/28. They all use a 50 length primary chain. The current Honda parts fiches show the same part number for the 500, 550, and the 650 primary chain - 23131-426-003.
Thanks Dave, I hadn't found the primary reduction number. Must be a typo because I see all the primary drive gears are 26T so the clutch basket gears will have to be the same too.
Correct. The difference is a rounding error as typed. 650's are all the same.
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I'm due to replace my rear alloy sprockets this off season anyway. For next year I plan to use the 650 clutch basket and primary gear to slow the clutch speed. Ultimately I'll need different size sprockets because of the reduction in overall drive ratio.
It's the other way around. The 550 manual shows primary reduction (which includes crank to primary and primary to clutch) at 3.063:1. The primary reduction on the 650 is 2.737:1. So at the same crankshaft RPM's, the higher 650 primary reduction will spin the clutch 1.119 times faster than the 550. At 10,000 crank RPM's, the 550 is spinning the clutch at 3264.773 RPM's. At 10,000 crank RPM's, the 650 is spinning the clutch at 3653.635 RPM's.
