TFC 63 mm big-bore kit components including cylinder, head, piston, camshaft and stroker crank, for GY6 QMI/QMJ, SKU 179-22 TFC 63 mm big-bore kit components including cylinder, head, piston, camshaft and stroker crank, for GY6 QMI/QMJ, SKU 179-22
TFC GY6 QMI/QMJ kit with cylinder head, camshaft and stroker crankshaft shown in another view, SKU 179-22 TFC GY6 QMI/QMJ kit with cylinder head, camshaft and stroker crankshaft shown in another view, SKU 179-22
TFC GY6 kit gasket shapes, piston ring set, metal pin and bagged small parts, SKU 179-22 TFC GY6 kit gasket shapes, piston ring set, metal pin and bagged small parts, SKU 179-22
TFC GY6 big-bore kit, alternate view of cylinder head, cylinder and stroker crankshaft, SKU 179-22 TFC GY6 big-bore kit, alternate view of cylinder head, cylinder and stroker crankshaft, SKU 179-22
TFC 63 mm big-bore kit components including cylinder, head, piston, camshaft and stroker crank, for GY6 QMI/QMJ, SKU 179-22
TFC GY6 QMI/QMJ kit with cylinder head, camshaft and stroker crankshaft shown in another view, SKU 179-22
TFC GY6 kit gasket shapes, piston ring set, metal pin and bagged small parts, SKU 179-22
TFC GY6 big-bore kit, alternate view of cylinder head, cylinder and stroker crankshaft, SKU 179-22

TFC

TFC 63mm Big Bore +3mm Stroker Kit - GY6 A-Case

SKU 179-22
$699.00
Shipping calculated at checkout.
Description

This TFC 63 mm big-bore and +3.0 mm stroker kit is listed for 150 cc GY6 QMI/QMJ A-case engines, with a stated finished displacement of 190 cc. The kit combines a cylinder and head, piston, A8 high-lift cam and stroker crankshaft; the product photos also show ring and gasket components.

This product is intended for off-road use only. This product is not intended for use on public roads or land.

Key Features

  • 63 mm big-bore cylinder: Designed for the listed 150 cc GY6 A-case platform.
  • Stroker crankshaft: +3.0 mm crank with 60.8 mm stroke.
  • A8 camshaft: High-lift cam included.
  • A-case fitment: 54 mm cylinder stud spacing and 65 mm cylinder skirt outer diameter.
  • 190 cc displacement: Stated kit displacement when installed in the specified engine configuration.
  • Performance use: Off-road use only.

Technical Specifications

  • Application: GY6 QMI/QMJ 152/157, 150 cc A-case engines
  • Kit includes: 63 mm cylinder and head, piston, A8 high-lift cam and +3.0 mm stroker crankshaft
  • Stated displacement: 190 cc
  • Cylinder bore: 63 mm
  • Cylinder stud spacing: 54 mm, A-case
  • Cylinder skirt outer diameter: 65 mm
  • Intake valve: 28 mm
  • Exhaust valve: 23 mm
  • Crankshaft stroke: 60.8 mm
  • Part number: 179-22
  • Country of origin: Taiwan

Compatibility

Engine platform Fitment details
GY6 QMI/QMJ 152/157 150 cc A-case engines with 54 mm cylinder stud spacing; listed kit displacement is 190 cc.

 

Confirm the engine family, A-case configuration and cylinder stud spacing before ordering. This is a performance kit intended for off-road use only.
Product Diagrams
Features
  • 63 mm big-bore cylinder kit
  • +3.0 mm stroker crankshaft with 60.8 mm stroke
  • A8 high-lift camshaft
  • 54 mm A-case cylinder stud spacing
  • 65 mm cylinder skirt outer diameter
  • Stated 190 cc displacement; off-road use only
Specifications

Part number: 179-22; application: GY6 QMI/QMJ 152/157 150 cc A-case; kit includes 63 mm cylinder and head, piston, A8 high-lift cam and +3.0 mm stroker crankshaft; stated displacement: 190 cc; cylinder stud spacing: 54 mm; cylinder skirt outer diameter: 65 mm; intake valve: 28 mm; exhaust valve: 23 mm; crankshaft stroke: 60.8 mm; made in Taiwan; off-road use only.
Model Fitments

GY6 QMI/QMJ 152/157 150 cc A-case engines with 54 mm cylinder stud spacing; kit listed for 190 cc finished displacement. Verify case and measurements before ordering.
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