57.4mm Cylinder Rebuild Kit for 4-Stroke GY6 150cc 157QMJ Engine with 76mm Bolt Pattern

Product Overview

Revive the power and efficiency of your GY6 150cc engine with the GOOFIT Professional Cylinder Rebuild Kit. Engineered specifically for the 157QMJ platform with EGR cylinder heads, this kit features the industry-standard 76mm bolt pattern and 2.5" tall head compatibility. Built from high-strength alloys with rapid heat dissipation, it is designed to eliminate oil burning and gas leakage, ensuring your scooter or ATV performs like new under any load.

Product Compatibility

This kit is a precise fit for 150cc engines with the Tall Head (2 1/2") and EGR configurations.

Component	Specification	Fitment Detail
Engine Code	GY6 150cc / 152QMI	4-Stroke Horizontal
Bolt Pattern	76mm (Critical)	Standard 157QMJ Layout
Head Style	EGR Head Compatible	2.5" Tall Cylinder Head
Vehicles	ATVs, Scooters, Go-Karts	TaoTao, Ice Bear, Wolf, etc.

Specifications

Attribute	Details
Cylinder Bore	57.4mm
Piston Pin (Wrist Pin)	OD: 15mm
Cylinder Hole Spacing	54mm / 2.12"
Bolt Pattern	76mm (Center-to-Center)
Included Components	Cylinder, Piston, Rings, 15mm Pin, Clips, Gaskets

Key Features

• Optimized for EGR Systems: Specifically designed to work seamlessly with EGR (Exhaust Gas Recirculation) cylinder heads, ensuring no interference with emissions components.
• Superior Anti-Wear Material: Crafted from high-strength alloys with excellent resistance to high temperatures and pressures, preventing deformation even during prolonged high-load operation.
• Precision-Honed Cylinder Wall: Meticulous machining of the cylinder-to-piston clearance reduces blow-by gas leakage, resulting in faster acceleration and better engine response.
• Eliminate Oil Consumption: High-quality piston rings and stable thermal expansion properties effectively reduce the risk of oil burning, keeping your exhaust clean and your oil levels steady.
• Complete Top-End Solution: This comprehensive kit includes everything from the cylinder body to the wrist pin and gaskets, providing an all-in-one fix for a smoking or low-compression engine.