'89 Yamaha fzr600 (also have a spare engine which is a '90) listed 91 hp @10,000rpm (redline is 13,500) and 47 ft lbs of torque- In my experience with engines on a dyno the listed hp ratings are always way high. I'm using 70 hp and 43 ft lbs for my calculations. If everything goes as planned my buggy will weigh around 350 lbs- the bikes weight was 459 llbs. so I'm going to be a little lighter and hopefully that will eaze the load on the tranny. Hope that wasn't TOO much info!!
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