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Posted: **Wed Aug 05, 2009 6:33 pm**

My son wants to make his 08 150R faster. It runs so good and is already fast so i'm afraid to change anything. Anyone have experience trying to improve performance without going to a big bore kit.

Thanks,
#343

Posted: **Wed Aug 05, 2009 7:41 pm**

Port and polish, oversize valves, higher compression piston and a cam...

Posted: **Thu Aug 06, 2009 10:59 am**

put a 450 motor in it..........

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Best way to make a stock 150R faster

Best way to make a stock 150R faster