GY6 150cc 57.4mm Big Bore Kit Cylinder Head Piston Gasket Set QMJ157

Product Overview

This aftermarket replacement big bore kit set is intended for GY6 150cc and QMJ157 applications and includes a cylinder head, piston, and gasket set as listed. A big bore kit set is used when servicing or rebuilding the top end of a small engine, where the cylinder, piston, and related sealing components work together to restore the combustion chamber assembly. The set is supplied for the GY6 150cc and QMJ157 engine applications with a 57.4mm bore.

Key Features & Performance

• Big bore kit set with a 57.4mm cylinder bore for the listed GY6 150cc and QMJ157 applications
• Includes a cylinder head, piston, and gasket set as supplied in the listing
• The cylinder and piston form the moving combustion assembly of the top end
• The gasket set helps seal the mating surfaces of the top end assembly
• Supplied for servicing or rebuilding the top end of the supported engines

Fitment & Compatibility

• for GY6 150cc applications
• for QMJ157 applications

Common Uses

• Rebuilding the top end of a supported GY6 150cc or QMJ157 engine
• Replacing a worn, damaged, or malfunctioning cylinder head, piston, or gasket set
• Servicing the combustion assembly during engine repair

Technical Specifications

• Product Type: Big Bore Kit Set
• Bore Size: 57.4mm
• Engine Application(s): GY6 150cc, QMJ157
• Included Components: Cylinder Head, Piston, Gasket Set
• General Application: Engine top end assembly

Frequently Asked Questions

Q: What is a big bore kit set used for? A: It is used when servicing or rebuilding the top end of a small engine, where the cylinder, piston, and gasket components form the combustion assembly.

Q: How should fitment be verified? A: Compare the complete existing part number, engine model designation, and bore size against the information supplied before purchase.

This is an aftermarket replacement part and is not represented as genuine or original equipment. Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number, model year, or existing part number. Verify fitment before purchase.