47mm Big Bore Cylinder Kit with Piston, Rings and Gaskets for GY6 50cc 4-Stroke Scooters, 80cc-100cc
47mm Big Bore Cylinder Kit with Piston, Rings and Gaskets for GY6 50cc 4-Stroke Scooters, 80cc-100cc 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.
47mm Big Bore Cylinder Kit with Piston, Rings and Gaskets for GY6 5...
47mm Big Bore Cylinder Kit with Piston, Rings and Gaskets for GY6 50cc 4-Stroke Scooters, 80cc-100cc is backordered and will ship as soon as it is back in stock.
Description
Description
- Perfect Fit: Engineered with precision to ensure a snug and secure fit for GY6/QMB139 engines. The 47mm cylinder provides increased power without compromising structural integrity, delivering smoother operation, better acceleration, and improved combustion. A reliable upgrade for restoring or boosting your engine.
- Wide Compatibility: Designed for a wide range of Chinese scooters, mopeds, ATVs, and go-karts, the RedCap Big Bore Kit fits most 4-stroke GY6 or 139QMB engine models from 50cc to 80cc. Compatible with brands like YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, STRADA, ROKETA, and more, ensuring versatility for countless vehicle types.
- Engine Upgrade: Boost your scooter or moped's power and efficiency with the RedCap 47mm Big Bore Kit. Designed for 50cc to 80cc 4-stroke GY6/QMB139 engines, this kit increases engine displacement, delivering better throttle response, smoother operation, and more horsepower for everyday riding or performance upgrades.
- Durable Construction: Crafted from premium-grade aluminum alloy, this rebuild kit offers exceptional durability, heat resistance, and wear tolerance. Each component is precision-machined to meet or exceed OEM standards, providing long-lasting reliability and enhanced engine life, even in demanding riding conditions.
- Easy Installation: Cylinder block, piston, ring set, circlips, piston pin, and gaskets. The user-friendly design ensures a smooth installation process, whether you're a DIY mechanic or a professional. Works seamlessly with stock carburetors for instant performance gains.
- Cylinder Bore Size: 47mm
- 1x Cylinder Block.
- 1x Piston.
- 1x Complete Ring Set.
- 2x Cirq clips.
- 1x Piston Pin.
- 2x Head Gasket Set.
- Fits many models such as YERFDOG, SUNL, SYM, PGO, KYMCO, VENTO, STRADA, ROKETA, FUJI, WILDFIRE, KAZUMA 80cc Big Bore Kit. This kit fits most Chinese Scooters/Mopeds with 50cc, 60cc 4-Stroke GY6/QMB139 engines.
Payment & Security
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