I just bought a SunL Atv 109, 90cc. It is a chain drive and seems geared too high. Is it possible to just put a different sprocket on? If so, please be specific on how to do this. I am rather new to Atv's.

 

I'm guessing it is the honda clone engine. You need to remove the front sprocket cover on the left side of the motor. If it is uses a six spline sprocket. The front sprocket from a 98 honda z50 should fit. The run all of $14. You can get them from 12 to 18 tooth. I use a twelve on my daughters yamoto atv, yours is probably a 14. It did make a difference with the low end. If this sprocket is correct then you also have a 420 chain. You may have to shorten the chain. You can always just add a second master link to it. I haven't seen a 90cc yet that can break a chain whether it has two master links or one.