hello every body my problem is that my top speed decreased from 80km/h to 69 km/h (GPS) and i want to fix this issue Everything in my bike is standard no kit HELP PLZ !!
thank you but i just changed the rollers the belt is fine cause the decrease wasn't progressive its spontaneous
what i ment is that if the problem caused by the belt the speed gonna decrease day by day 80>76>72>69 but happens in one day after i changed an old original standard air filter by a new one
Ah, now I understand. I would hazard a guess that the old air filter was more dense than the new one, or maybe dirty, thereby not allowing as much air through as the new one. Or vice versa. If you still have it, put the old filter back on and see what happens. If it goes well again then it will need either up or down jetting to balance the new air filter flow through.
by the way when i accelerate while the wheel doesnt touch the ground it looks like it want accelerate more but something stop it from that the rpm increases for a while then go back
