Universal Parts GY6 Cylinder Head Gasket Kit - 57.4mm 150cc

GY6 150cc Top-End Gasket Set

Ensure a perfect seal and maximum compression with the Universal Parts GY6 Cylinder Head Gasket Kit. Specifically designed for the standard 57.4mm bore 150cc engine, this comprehensive 5-piece kit provides every gasket required for a top-end rebuild. Whether you are performing a routine valve adjustment or installing a fresh cylinder, these gaskets are engineered to withstand the high thermal stress and combustion pressures of the 157QMJ engine family.

Key Features

• Complete Rebuild Solution: Includes the head gasket, base gasket, exhaust gasket, intake manifold gasket, and timing chain tensioner gasket.
• Multi-Layer Head Gasket: Engineered for superior heat dissipation and high-pressure sealing to prevent "blown" head gaskets and compression loss.
• High-Temperature Exhaust Seal: Features a reinforced exhaust ring to eliminate annoying exhaust leaks and "popping" during deceleration.
• OEM-Spec Fitment: Precision-cut for the standard 76mm diagonal bolt spacing found on most 125cc and 150cc GY6 platforms.

Comprehensive Fitment Guide

This kit is a direct fit for GY6 125cc and 150cc (QMI/QMJ 152/157) 4-stroke engines found in:

Technical Specifications

• Diagonal Bolt Spacing: 76mm
• Head Gasket Inner Diameter: 59mm
• Base Gasket Inner Diameter: 62.5mm
• Exhaust Gasket ID/OD: 23.5mm / 30mm
• Manifold ID: 25mm

Mechanic's Note: Gaskets are "one-time use" items—never attempt to reuse old gaskets during a rebuild.

Installation Tip: Ensure both the cylinder and head surfaces are perfectly clean and free of old gasket material before assembly.

 Pro Tip: Always use a Torque Wrench to tighten your head studs in a "star pattern" to ensure even pressure and prevent the head from warping!

SKU: 137-02
Vendor: Scooterworks USA, LLC