Are your brakes binding sprocket sizes choke chain may all have a effect carb could need cleaning bowl could be sticking overflowing or even piston rings could need replaced tyre tread psi or valve timing. don't know bike but if there's a belt for aluternator or water pump need ajusting loser. wheel bearings shocks and balanced carb spark plug need new one or just loss weight drink your case of beer befor you get there