Originally Posted by 2door
Grinding the end of the pin completely off helps. Grind it flush with the side plate then use a small punch and hammer. You need to support the chain level so you don't pound a kink into it. A 3/32" punch is what you'll need but some guys even get by with a nail. A general rule of thumb: The better the quality of the chain you have, the better quality chain breaker you'll need. Some of the cheaper dept. store breakers just won't work on a well built chain. They bend or break before the pin moves. I'm not familiar with the Park breaker.
It's a tight fit but I managed to shove the number 41 in the chain breaker.