BEST GY6 50CC 100CC CYLINDER BIG BORE KIT BBK 50MM ID 1P39QMB 139QMB 64MM VALVESFits for GY6 Scooter Moped 139QMB 1P39QMB 50mm Big Bore Cylinder Piston KitSKU: AC-YCZYQ-5112Features:⭐100% brand new and high quality,Durable.
⭐It could correctly replace the original quality part.
⭐This Performance Racing Parts kit can make full use of your 48cc, scooters.Specification:
- Material: Metal
- Head: 64mm valves
- Cylinder Size: 50mm ID
- Intake Valve Diameter: 18mm
- Exhaust Valve Diameter: 16mm
- Performance Racing CDI (AC Fired): 70mmx30mmx37mm
- Performance Racing Coil length: 360mm
Please allow 0.5-1 inch difference due to manual measurement.(1inch=2.54cm)
Please Compare The Scooter Kit With Your Original One Before Purchasing!Fits (For the reference):✅For 139QMB & 1P39QMB /GY6 4 Stroke Chinese ScootersNOTE:Installation Manual Is NOT Included
Professional Installation Is Highly RecommendedPackage includes:
- 50mm Big Bore Cylinder Kit With Assembled Head,
- Performance Racing CDI (AC Fired),
- Performance Racing Coil
- Rollers
- Rocker Arms
- Oil Pump & Drive Gear
- Intake & Exhaust Studs & Complete Gasket Set
PaymentDelivery detailsTerms of salesAbout usContact usPaymentWe accept payment 。Fees such as import duties, taxes are not included in the item price or shipping costs. These charges are the buyer\'s responsibility.Delivery detailsShipping:2-9 working days to: USATerms of sales
- We maintain high standards of excellence and strive for hundred percent customer satisfaction. response is very important to us. We hope that you contact us immediately before you give neutral or negative response, so that we can address your concerns. It is impossible to address issues if we do not know about them!
About usYour satisfaction is our ultimate goal. We work hard to earn your trust and future business. Our certified technicians have tested each item before shipping. The unit comes with 1 year limited warranty on all manufacturing defects.a) If you receive a defective item, you may return it or ask for a discount. Please contact us within 14 days after you receive the package.b) What you returned must be intact and in its original packaging as re? u. Customer is responsible for shipping costs of the returned item.c) We will cover the cost of shipping back t with the shipping rate indicated in the registration page. We will send you a new unit or refund the full payment you paid.Thank you.Contact usBusiness Hour Business Hour: Monday To Friday: 8:30 AM to 5:00 PM (Beijing China time)Due to time zones, our reply to your questions may not be immediately. But within above working time, we will reply your email within 24 hours. If it\'s non-workdays, please kindly be patient and wait till Monday.Please contact us with message.Please feel free to contact us if you have any questions. Monday To Friday: 8:30 AM to 5:00 PM (Beijing China time)Due to time zones, our reply to your questions may not be immediately. But within above working time, we will reply your email within 24 hours. If it\'s non-workdays, please kindly be patient and wait till Monday.Please contact us with message.Please feel free to contact us if you have any questions.
On Aug 6, 2026 at 23:08:14 PDT, seller added the following information:
