I have an 05 660 Grizzly and I am having problems. When trying to start it struggles to turn over. I put a new starter in but same result. The starter has been tested and spins freely when off the bike. I have a vid of what it sounds like jumping from the battery to the starter but can't seem to post it. Basically it sounds like a car with a dead battery. Rar...rar. The battery tests fine. Any ideas?