Just picked up my first YFZ. It’s an 04 with lots of mods. Got a good deal on it since it was not running. Needed a carb and battery. Just installed both and I can’t get this thing to fire up. When I push the start button the red light turns on and the starter clicks. If I put it in gear and rock the bike back I can get like a quarter of a crank then it stops. I know the bike sat for a couple years……any suggestions??????