This whole sport is BS.
Its not about money its about time, ask the dudes who threw thousands at engines in AM hulls to be underwhelmed.
Everything's a secret and the answer is always talk to your engine builder even though they haven't answered you in months cause you bought the cylinder 2nd hand or the cases are different or the carbs.
So they either don't care or don't know.
Or the other end: you bought that 900c full comp but wanna move on and sell and the buyer blackmails you for rebuild parts
Yada yadda. This whole sport is like going to a party at a big house and no one will tell you where the toilet is as a right of passage or something.
