Re: crankcase bolt
There is a simple way to cure your problem. Go to your local hardware store or machine shop and get a heli-coil kit. With a heli-coil you simply drill the hole out slightly larger then screw the heli-coil in, this acts like new threads, you will also be able to use the same size bolt as before. There should be more detailed instructions with the kit, so don't worry if you think you need more info.