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Message: [QUOTE="bclapham, post: 945139, member: 25565"] if you get the 144 kit from Gorr, the porting will be included. if you want more power accross the RPM range, you need more CCs. if you want the power in a different RPM range, then porting. note- its easily possible to get crazy HP numbers by tuning an engine to rev to the moon. it wont be a good engine for MX tho, and you will need to rebuilt it every race. i had a 2002 RM144, it was a good bike. [/QUOTE]