PRICES AND LISTINGS ARE SUBJECT TO CHANGE AT ANY TIME WITHOUT NOTICE. DO YOU MAKE A LIVING WORKING ON BIKES?ARE YOU A SHOP OR DEALER? 99% of problems can be easily solved without returning the entire order. You can return all or part of your order. Once items have been opened from sealed packaging, modified, installed, or used in any way they are not eligible for return. Unless otherwise stated, we stand behind all parts we sell 100%. This product is NOT DIY. Over 99% of people in the world are not qualified to build an engine, and It is the responsibility of the engine builder to inspect every part and make sure each one is installed, tuned, and working properly. We ALWAYS STRONGLY recommend this be done by a qualified, experienced mechanic. Positive reviews and feedback are greatly appreciated. Also, we will give you a discount on your next order if you take the 2-3 minutes required to leave us a good review! But we want to know the good and the bad. If an order is sent incomplete or incorrect we correct it IMMEDIATELY. Work with us and we will always work with you.