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It can be Only Used for GY6 4stroke 49cc 50cc engine upgrade
Easy installation with video instruction,you can visit the video on our facebook homepage and Youtube.
Best way to get more RPM,maximum upgrade kit for GY6 50cc 139QMB engine and 1P39QMB Engine.
Valve Length 64mm ,does not for 69mm one
The Belt Cover/CVT Cover Gasket is for a Short Case Version
pls confirm The size of the product meets your requirements before you purchase Note:please allow 0.5-1 inch difference due to manual measurement.1inch=2.54cm Replacement for: For 49cc 50cc 4 stroke scooter For Kymco 50cc 4 stroke For Taotao 49cc 50cc 4 stroke scooter For Sunl 49cc 50cc 4stroke scooter For Jonway 49cc 50cc 4 stroke scooters For Fly 49cc 50cc 4stroke scooters For Tank 49cc 50cc 4 stroke scooters and many other GY6 4stroke 49cc 50cc engine Package Included: Big Bore Cylinder Kit x 1pc GOOFIT Keychain x 1pc About After-sales service: First of all,we sincerely apologize to you for returning exchange or refund caused by any reason.Please be assured,no matter what the problem.Please contact us first,we will do our best to solve any problem for you.We attach great importance to every customer.Your satisfaction will be our greatest impetus About GOOFIT: GOOFIT was established in 2000.We are a leading website selling,ATVs parts,Go Karts parts,Dirt Bikes parts pocket bike parts,Moped scooter parts online Company Culture: We are committed to providing the best products and services for our customers