Hey I am wondering if it is a good idea to bore out my 350. It has 17k on it and looks great inside. I am not too sure what these motors can handle. I would need to know what I need to do to the top end as well as the bottom end. Or if anyone out there has a set of pistons for this bike I need some. e-mail me at [email protected] or post it here. Thanks. I will take all of the information that I can get.