if you still don´t get the power your looking for after the suggestions from previous letter. If you are mechanically inclined, you need to adjust/replace the shims in the cams. taking them back to factory specs will increase your power. My bike had a loud knock in engine and little power, after I had chaneged the shims in the cam I had a siginicant power increase. doing this takes time, ususally don´t get it on first try. Be patient, and take your time with it.