6/15/2023 0 Comments Kawasaki g5 100 horsepower![]() Then widen/raise the exhaust port some, depending on the desired powerband. Make sure the valve goes on the correct side out, or the timing will be out the window! ![]() On the intake side, the carb was a Mikuni VM 19, also tricky to increase carb size significantly due to limited space inside engine cover and the design of the rotary valve cover.įor general theory and tips regarding tuning and rebuilding two-strokes, I would strongly recommend "Two stroke performance tuning" by A.Graham Bell.Īs far as my experience goes, I would modify the rotary valve for longer inlet duration, a reasonable starting point would be finished closing not later than 60 degrees ATDC, starting opening 120 BTDC. There is little room for boring out, I think biggest OEM piston is around 50.25. ![]() 5 transfer ports were the best basis for performance increases. These had a cast iron cylinder with 3 or 5 transfer ports, bore 49.5 mm. These bikes were european/norwegian models. I have some experience with these engines of 1978-1980 vintage, in road going KH 100 and KE 100s.
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