See our Backlash diagram for fitting info. We recommend that you use these kits as we have done extensive testing and found these to jet the bike the best. We also suggest moving the needle to the middle notch for correct tuning. The newer style exhaust port gaskets are larger and can crush down and obstruct your ports. This dramatically cuts down on your exhaust flow, thus the bike will lose some power.
Many people read their park plugs wrong.
The correct color for your plugs to read is a light grey. If they are tan, brown, or black, then your bike is running too rich. If the plugs are white, you are running to lean and need to richen up your bike. If you are using our jet kits, removing the nylon washer will help richness, while adding a washer will improve leanness.