hi. new 2 site but gota runner 172 inc 180 vario with 13.5 malossi rollers, malossi kevlar belt, std clutch with green malossi springs, short white contra, std carb with std airbox with a 92 jet in carb and a j.lomas exhaust. my bike pulls lovely BUT it does not kick in till its doin about 3.500revs. im after a quicker/sharper bite/take off so any advice/help would be appreciated. thanks in advance. also i have a set of 180 gears but they are the rolling nut on the outside where as myn is the opposite, can i interchange the secondary gearing from one to the other??(i.e. put the 180 secondary gears into the 125.