The crankshaft on your golf cart is an essential item. First off, it generates the pressure needed in the crankcase to power the fuel pump. Without this helpful aide, there would be no way to get the gas to the carb. Secondly, the connecting rods are mounted to it as well. This is what drives your piston in and out of the cylinder. Without these guys, there would be no compression. Suppose anything on the crankshaft fails, like a Yamaha 4-Cycle Flywheel Side Bearing. In that case, it will quickly bring down the entire operation of the cart. If you or your mechanic have determined that this is the issue, now is the time to act. Do not let this turn into a more costly rebuild.This is not a Yamaha part that you are just going to throw into your caddie. This golf cart bearing is a part of a significant rebuild. Do not expect to get this done in half an hour. However, if you call the experts at Buggies Unlimited, they can set you up with an OEM manual to help with the process.