44mm Big Bore Cylinder Kit (53cc-54cc Upgrade) for 2-Stroke 47cc 49cc Pocket Bike ATV

Product Overview

Unlock the full potential of your mini ride with the GOOFIT 44mm Big Bore Top-End Kit. Designed as a high-performance upgrade for standard Chinese 47cc/49cc 2-stroke engines, this kit increases displacement to 53cc-54cc, delivering an impressive 2hp - 3hp boost. Whether you are racing or off-roading, this precision-engineered kit provides the extra torque and acceleration needed to dominate the track.

Product Compatibility

This is a Performance Upgrade Part for 2-stroke small engines. It converts standard 47cc/49cc motors into high-output 53cc/54cc powerhouses.

Vehicle Category	Compatibility	Performance Gain
Pocket Bikes	Chinese 47cc / 49cc Super Bikes	+2hp to 3hp Boost
Mini Quads / ATV	43cc-50cc Kids ATVs & Quads	Enhanced Low-end Torque
Mini Dirt Bikes	47cc / 49cc Pit Bikes	Faster Acceleration

Specifications

Attribute	Details
Cylinder Bore	44mm / 1.73" (Big Bore)
Piston Pin Length	37mm / 1.46"
Effective Displacement	53cc - 54cc
Engine Type	2-Stroke Air-Cooled
Material	Hardened Coated Alloy & High-Strength Steel

Key Features

• Instant Power Upgrade: Specifically engineered to boost your regular engine's output by 2hp - 3hp, providing a significant increase in both top speed and climbing power.
• Precision Hardened Coating: The cylinder inner walls feature a specialized hardening treatment and anti-corrosion coating, ensuring stable performance during sustained high-speed operation.
• High-Compression Piston: Paired with a high-strength forged piston that reduces friction and vibration, maximizing energy transfer and engine responsiveness.
• Superior Gas Sealing: Precision-manufactured components eliminate air leaks and ensure exceptional sealing, keeping your engine running at peak efficiency for years.
• Direct Performance Fit: Designed as a top-end replacement for most Chinese-made 2-stroke 47cc/49cc engines, making professional-grade tuning accessible for DIY enthusiasts.