Engine light came on the dash steady on my 600 rmk. Decided it was due to poor fuel from sitting all summer with a quarter tank and possibly too much stabalizer. So I topped the rest of the tank up with premium to mix with the bad fuel. Took it out today and light is still on, engine seems fine except for if Ipunch it around mid thotttle it will not rev up and same with top end will not go past about 8000 rpm when I jam it. Wondering if the light retards the engine from revving up to high to prevent engine damage? or if I have a bigger problem. I don't think the track is ratcheting. engine and clutch is all stock.