Originally Posted by
ma racer
will do captain. thanks. Any clue as to a reference point? The ol XR is worn from only one season of mild to heavy use. temps under control etc. but became hard to use so I took it to a local Max Power sponsored driver and he recomended an internal rebuild. Should I keep the stock shims in place? 30% nitro,,,in Houston no less. Thanks,
well if you are going to use the new stuff get the new head button and start with stock xrs which is two .30 shims but you have to check the new button first