Big bore cylinder kit parts set with cylinder head, piston, and gaskets in gray and black

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

$142.99
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Big bore cylinder kit parts set with cylinder head, piston, and gaskets in gray and black
  • Big bore cylinder kit parts set with cylinder head, piston, and gaskets in gray and black
  • Big bore cylinder kit components laid out: cylinder, head, and multiple blue-tinted gaskets
  • Cylinder block with open bore and finned exterior, showing piston cylinder interior
  • Cylinder head assembly with two valve springs and fasteners on a silver metal base
  • Finned cylinder assembly with smooth bore opening and side ports, shown on clear packaging
  • Big bore cylinder kit cylinder parts shown from multiple angles, gray metal components
  • Big bore cylinder kit cylinder block shown from different views with visible bore opening
  • Cylinder head with two valve spring wells and circular ports on a gray metal housing
  • Cylinder head with two black intake ports and mounting holes on a gray metal body
  • Cylinder gasket set: single large black gasket with mounting holes and cutout channel
  • Metal engine cam gear with shaft and mounting flange, silver finish
  • Metal engine cam gear and shaft assembly with toothed wheel, side view
  • Silver piston with wrist pin and pin sleeve, engine cylinder part
  • Silver engine piston with ring grooves and valve reliefs, close-up
  • Big bore cylinder kit parts set with cylinder head, piston, and gaskets in gray and black
  • Big bore cylinder kit components laid out: cylinder, head, and multiple blue-tinted gaskets
  • Cylinder block with open bore and finned exterior, showing piston cylinder interior
  • Cylinder head assembly with two valve springs and fasteners on a silver metal base
  • Finned cylinder assembly with smooth bore opening and side ports, shown on clear packaging
  • Big bore cylinder kit cylinder parts shown from multiple angles, gray metal components
  • Big bore cylinder kit cylinder block shown from different views with visible bore opening
  • Cylinder head with two valve spring wells and circular ports on a gray metal housing
  • Cylinder head with two black intake ports and mounting holes on a gray metal body
  • Cylinder gasket set: single large black gasket with mounting holes and cutout channel
  • Metal engine cam gear with shaft and mounting flange, silver finish
  • Metal engine cam gear and shaft assembly with toothed wheel, side view
  • Silver piston with wrist pin and pin sleeve, engine cylinder part
  • Silver engine piston with ring grooves and valve reliefs, close-up
For GY6 150cc 57.4mm Big Bore Kit Set Cylinder Head Piston Gasket Set QMJ157

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

$142.99
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Product Overview

This big bore kit set is an aftermarket replacement part intended for GY6 150cc engines. The set includes a 57.4mm cylinder, cylinder head, piston, and gasket set, and it is listed for the QMJ157 application. It provides the major top-end components commonly replaced together during an engine rebuild or displacement change.

Key Features

  • Aftermarket big bore kit set for GY6 150cc engines
  • 57.4mm cylinder specification as listed
  • Includes cylinder head, piston, and gasket set
  • Listed for the QMJ157 application
  • Set-style offering for top-end rebuild components

Compatibility & Fitment

  • Big bore kit set for GY6 150cc
  • Listed application for QMJ157

Product Details

  • Product Type: Big bore kit set
  • Bore Size: 57.4mm
  • Included Components: Cylinder Head, Piston, Gasket Set
  • Model Application: QMJ157
  • Engine Application: GY6 150cc

Frequently Asked Questions

Q: What is a big bore kit set used for? A: A big bore kit set is used when rebuilding or increasing the displacement of a small engine, replacing the cylinder along with the matching piston, cylinder head, and gaskets as a coordinated top-end assembly.

Q: How do I verify this kit fits my engine? A: Confirm your engine is a GY6 150cc with a QMJ157 listing, then check the 57.4mm bore size and compare the included cylinder head, piston, and gasket set against your existing parts before purchase.

This is an aftermarket replacement part for the referenced application and is not represented as genuine or original equipment. Compatibility may vary by model, production date, serial number, or existing part number. Verify fitment before purchase.