100cc Big Bore Head and Cylinder Kit with Piston and Rings for GY6 50cc 4-Stroke Engines
100cc Big Bore Head and Cylinder Kit with Piston and Rings for GY6 50cc 4-Stroke Engines is backordered and will ship as soon as it is back in stock.
Pickup available at 2875 N Berkeley Lake Rd NW #4
Usually ready in 1 hour
Not sure? Text or email a photo of your old part or your engine model number. We'll confirm it fits before you buy.
Delivery and Shipping
Delivery and Shipping
Ships from our Duluth, Georgia warehouse.
Most in-stock orders ship the same business day. UPS orders placed before 3:00 PM ET, USPS orders before 12:00 PM ET. After the cutoff, they go out the next business day.
Standard delivery runs 2 to 6 business days to most US addresses. US territories take 7 to 14. These are carrier estimates, not guarantees.
Free shipping on most parts, no minimum order. Oversized items (body kits, wheels, tires, batteries, and engines) are quoted to your address and shown at checkout before you pay.
We ship UPS and USPS, and email your tracking number as soon as the order leaves.
Questions? Call or text 404-532-9833. Full details on our Shipping page.
100cc Big Bore Head and Cylinder Kit with Piston and Rings for GY6 ...
100cc Big Bore Head and Cylinder Kit with Piston and Rings for GY6 50cc 4-Stroke Engines is backordered and will ship as soon as it is back in stock.
Description
Description
- Wide Compatibility: This kit fits most Chinese scooters and mopeds using GY6/QMB139 4-stroke 50cc–60cc engines. Compatible with popular brands and models, it offers a versatile and cost-effective way to boost engine output without replacing the entire engine, perfect for performance tuners and riders alike.
- Performance Boost: Take your ride to the next level with this 100cc Big Bore Kit designed for GY6/QMB139 engines. The increased displacement dramatically enhances acceleration, torque, and top-end speed, transforming a standard 50cc or 60cc engine into a high-performance machine ideal for both commuting and recreational riding.
- Improved Compression: Includes piston rings designed to deliver superior compression for improved combustion efficiency and power output. The wrist pin and circlips lock everything in securely, reducing engine knock and vibration while maximizing the engine’s smoothness and consistency under load.
- Durable Construction: Engineered from high-grade aluminum alloy and built to withstand high temperatures and pressure, this kit includes a precision-machined cylinder, piston, and ring set. The durable construction ensures long-term reliability and minimizes wear, even under aggressive or extended use on roads and tracks.
- Hassle-Free Installation: Designed for plug-and-play convenience, the Big Bore Kit comes with everything you need—cylinder, piston, rings, wrist pin, circlips, base gasket, and head gasket (head not included). Ideal for both professional mechanics and DIY enthusiasts looking for a quick, effective performance upgrade.
- Cylinder
- Piston & Ring Set
- Wrist Pin
- Cirq Clips
- Head Gasket
- Base Gasket
- HEAD NOT INCLUDED
- Fits most Chinese Scooters/Mopeds with 50cc, 60cc 4-Stroke GY6/QMB139 engines.
Payment & Security
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