[team gorilla racing TGR]

hi guys i got a jr50 dirt bike and it seems pretty gutless when your on the throttle there is no mods for it as i know of so any help on getting it to run faster wpuld help it curently gos 36 so it beets me friends cag but takes forever ive rejetted and polished intake. im planning to lighten flywheel any help would be apreciated. its 2003 model look it up to see.
yes i know its for 5 year old kids but hell its fast just not... fast