unless you have some seriouse power using both gear ups will only make your bike slower. id sudgest you fit the pre pressed stage 6 primary gear kit from scooter-attack as it saves having to pay somone to press it together for you
Cool, I have just looked at those stage 6 kits, what a cool idea! how do you start working out which ratio to go for, is it a case of the more power you have the taller the gearing. would a 15/38 be middle of the road? Also on the scooter-attack site its says Attention! Since 8/98, primary shafts with bearings are used. Please check before ordering. So I assume the kits they sell are for are post 98 ones?