i have a fully derestricted 03 aerox vith a zx pipe and 4.5 gram rollers. the bikes acceleration is so slow but its top speed is ok when it eventually gets there. also it doesnt sound the same as my mates ped's theres are like normal high pitched two stroke but mine is like a very deep grumbling i was thinking it might be the clutch because its sounds like its always in a high gear or something also it will go quite quickly to 20mph and then crawl to 30 mph an then go normally again. thanks louis
stiffer springs and lighter rollers, i would get your mains and seals checked for the noise you described.
