Ok, real quick. I bought a DTX Raze last week. So far everything is stock (will get a few hop-ups next week) and runs great. But in a quest to get more performance, I'm looking to reduce some rotating mass from the drivetrain. Not only will it help with acceleration and braking, but also with overall weight reduction. The most powerful engine in the world doesn't do any good if you have a crappy power to weight ratio. So here's my question, the stock flywheel is 38mm in diameter. I have found a couple that are aluminum and should fit, but they are 1 or 2 mm smaller in diameter. What negative effect, if any, will the smaller diameter flywheel have on the engine?

I just noticed there is an engine section and I should've posted that there. Feel free to move thread mod.