We strongly recommend an experienced mechanic install this kit & tune the engineThis product is suitable for the following modelsET4 125cc 4T AC after 00 ZAPM19000ET4 150cc 4T AC after 00 ZAPM19000GT 125cc 4T LC after 03 ZAPM31100LX 125cc 4T AC 06 08 ZAPM44300LX 150cc 4T AC after 06 ZAPM44200Tips:1. Please confirm the parts will be fit on your scooter / motorcycle before you place the order.2. If you do not know whether the parts will fit or not, please send us the photo of your motorcycle or engine by Message.3. Some Modified Spare Parts is a small change on your original motorcycle or engine.