I had to replace the crankshaft in my 650-H1. I have installed the crankshaft and the crankshaft balancer. However, when I try to rotate the crankshaft it is hitting the balancer. Do I need to shim the crankshaft to allow the necessry clearance. The original crankshaft did not have any shims. This looks like the only way to get the two pieces to align.