So I just bought this bike from someone in my group because it has been in the group for 8 years now. This has been the wheelie champ next to my brute force 750. Shortly after buying it and doing a few awesome wheelies it now hesitates when hitting the throttle. Any ideas?
thanks in advance

 

I don't know the old 700 Grizzly but if an EFI bike starts to stutter, fit a new plug, just in case, then check the fuel filter, and blow the injector out. However, if you are getting an EFI warning light, it is probably easiest to get a Yam dealer to do diagnostic tests on the fuel system.