Description
63mm Big Bore Kit for GY6 125cc and 150cc Engines
This big bore kit increases your GY6 engine's displacement to 180cc, providing increased low-end torque and improved climbing capabilities. Designed for GY6 125cc and 150cc engines, this kit is ideal for scooters, recreational vehicles, compact cars, and various utility applications. It is one of the GY6 150cc scooter parts that can significantly improve performance. Ensure your engine case is properly bored to accommodate this upgrade.
Complete Top-End Package
This kit comes fully equipped with all necessary components including the cylinder, piston, circlips, ring set, and gaskets. The finned aluminum cylinder is designed to dissipate heat effectively, making it suitable for demanding applications. This comprehensive package simplifies your upgrade process.
Installation Requirements
Before installation, the engine case must be bored to fit the 64.9mm sleeve of the cylinder. This is important to prevent damage to the cylinder. Additionally, consider re-jetting your carburetor or upgrading to a larger performance carburetor for better fuel delivery. Pairing this kit with a performance camshaft can further maximize its capabilities.
Specifications
- Bore: 63mm
- Displacement: 180cc (with stock 57.8mm stroke)
- Sleeve Outer Diameter: 64.9mm
- Cylinder Height: 90.5mm
- Stud Spacing: 54mm
- Includes: Cylinder, piston, 2 circlips, 5-piece ring set, base gasket, head gasket
- Replacement Rings: 63mm Piston Ring Set
- OEM Part Number: OPS 164-310
Fitment
This Big Bore Kit is compatible with various GY6 engine models.
- GY6 engine codes: 152QMI, 157QMJ, 161QMK, 1P57QMJ, 1P61QMK, YN1P57QMJ, JJ157QMJ, BN157QMJ, BN161QMK-A
- Scooters: ZNEN, Wolf, Ice Bear, Bintelli, Lance, Jonway, Roketa
- Recreational vehicles: Hammerhead 150 series, Carter Talon 150, TrailMaster 150 XRX/XRS, American SportWorks, Manco 150
- ATVs and UTVs: TaoTao Bull 150, Rhino 150
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
Shop more: GY6 150cc Scooter Parts (157QMJ) · GY6 Scooter Parts · Scooter Big Bore & Cylinder Kits · Scooter Parts
Customer Reviews
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.