doesnt matter what your jets are if they work with what you have where you are. You can tell your main jet size by taking the float bowl off the bottm of the carb. there is a little hex shaped thingy in the middle holding a small plastic shield. It will have a number in it that is your main jet size. There is another small hole that has a hole in it made for a flat tip to unscrew it out. Thats your pilot jet. the hole that you needle goes into is the needle jet and your needle itself has a size and taper marked on it. Pro Circ are good low/lid range pipes. depending on any change in airflow, will efect jetting. A direct replacemnt, you probley wont need to change it,. but another pipe will most likely need a change in jetting. Also do a search for "plug chops"