Join Date: Jan 2006
Location: Indianapolis, IN
One down in the front is equal to three up in the back, but the smaller you go in the front the faster the chain will wear due to the sharpness the turn you'r imposing on it. One or maybe two down in the front is ok but any more is a bad idea. As far as the back the bigger you go the longer the chain you'll need. If you go one down, two up you can use the stock chain, but it is better to go with all new due to varying wear patterns. 520 is skinnier and lighter than stock but it does have HP limitations.