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I raced in the early 80's (when not using my domi 500 motor) with what was basically a Combat motor with 4s cam, racing 2 into 1 exh bolted in my wideline. I assumed the crank would be ok without checking the balance because it came from an alcohol burning grass track outfit. That level of tune was fine for UK short circuits as very few commando motors were any more powerful and it was even good enough for B.O.T. It was all good fun because we kept away from the classes for 1000cc 4cyl stuff and I didn't see engine bits flying everywhere!

[QUOTE="hybridracer, post: 648276, member: 4858"] I raced in the early 80's (when not using my domi 500 motor) with what was basically a Combat motor with 4s cam, racing 2 into 1 exh bolted in my wideline. I assumed the crank would be ok without checking the balance because it came from an alcohol burning grass track outfit. That level of tune was fine for UK short circuits as very few commando motors were any more powerful and it was even good enough for B.O.T. It was all good fun because we kept away from the classes for 1000cc 4cyl stuff and I didn't see engine bits flying everywhere! [/QUOTE]

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