I believe the bike has stock sprockets, been stretched a little also. Thinking about -1 +2 and maybe a 520 chain, but I don't know the pros of doing that offer stock chain. Any suggestions? I know with the stretch wheelies won't be as bad lol

 

Yeah, but with the stretch the handling won't be as good. Trade off. I have a 520 chain on my bike with stock gearing. Looking back, not worth it if the bike is only on the road.

 

I did the sprocket change -1 +2 and played with the combination and ended up going back to factory 16-43. It depends what you are looking for, I often found me looking for another gear.