Hi all rc boaters tune pipes there are so many different pipes out there size wises short ones long ones 1 inch 2 inch and even a 3 inch band pipe so to boil it down i have a zenoah stock 26cc motor with a race 257 carb have got a race pipe (1 inch band) from bonzi sports motor goes good i have anther pipe not sure where i brought it from has a 2 inch band motor still goes good its for a cat (acr42) are these the ideal pipes or should i be looking at different pipe ? i know there are some good pipes out there makes etc but would like the right one if someone can point me in right direction many thanks for any input. im trying to get the maxim out of my motor.