The Yamaha Crankcase Bolt for Models G20 and G21 is one of those parts you will not get very far without. This specific bolt is one of several that hold the cover on the crankcase. This is crucial because the crankcase must maintain pressure to run the fuel system. The Fuel pump itself is run off of the crankcase's pressure.It is a match made in heaven. The pump needs to flex its diaphragm to draw fuel from the tank and send that fuel to the carb. This is the exact pressure condition the crankcase creates as the shaft turns. You get an in and out push and draw effect at a shallow pressure that is perfect for what we need it to do. Now, if even one bolt is missing, that pressure can change and not allow any gas to get to the engine. Call Buggies Unlimited and make sure that is not the case for you.This Yamaha accessory is one that you need to get a basic rebuild completed. All you have to do is call one of our helpful reps, and they will put a kit together for you that will meet your needs. Or, if you are looking for something more finalized, you can get one of our pre-made packages. These will either do the entire top end or the whole engine.We know things can get crazy around the house. It always seems to happen when you are trying to concentrate. You set out to write a list for your golf cart, and now the kids have an endless list of questions for you. Who knows what you may have forgotten when you got distracted and lost your place. That is why we are here. Call one of our friendy caddie specialists. They will be happy to get you rolling down the right path. At whatever speed you choose.