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So i have this winter project that I'm getting into. Its a 1975 yamaha dt250. The plan is to turn it into a cafe racer. One of the things that will be done is an engine overhaul. While the engine is apart I was thinking of going bigger. Right now its 246cc. Wiseco make a 2mm over piston so I can punch it up to 253cc. As of right now the motor runs. One or 2 kicks and it starts. So the question i have is. Will it be worth it? Will there be a noticeable HP gain?