right i am posting for a friend here now he has a aerox with a polini sport 70 del 21mm carb etc with yasuni r and at the moment its a back wheel badboy lol its mental acceration but top end aint great if he put a secondary gearing kit in how much of his amazin acceration would he lose and how much top end would he gain? cheers
tell him to go primary, if he went 33% the power would kick in around 15-20 mph rather than 5mph and in theory, if he can max the gear, he'll be doing 85mph so pobably about 65-70 on a polini sport.
