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Blue Line 50mm Big Bore Gasket Kit - GY6 139QMB 81cc

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Blue Line 50mm Big Bore Gasket Kit - GY6 139QMB 81cc

Name: Blue Line 50mm Big Bore Gasket Kit - GY6 139QMB 81cc
Brand: Blue Line
SKU: 1100-1574
Price: 6.00 USD
Availability: OutOfStock

$6.00

Part number 1100-1574

Check dimensions and compatibility before ordering.

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This Blue Line Big Bore Cylinder Gasket Kit is the gasket set for 50mm-bore big bore kits on GY6 139QMB / 139QMA 50cc scooter engines. On the stock 139QMB stroke, a 50mm bore brings displacement to about 81cc. Use it to install a new kit, or to reseal an existing one after a rebuild or a blown head gasket.

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

Features

Sized for 50mm bore: Matches 81cc big bore cylinders on the 139QMB.
Coated head gasket: Black coated head gasket seals combustion pressure.
Base gasket: Paper cylinder base gasket seals the cylinder to the crankcase.
Intake gasket included: Seals the intake manifold to the head.

Specifications

Part number: 1100-1574
Bore size: 50mm
Displacement: 81cc (with 139QMB stroke)
Includes: Head gasket, cylinder base gasket, intake manifold gasket
Engine: GY6 139QMB / 139QMA 50cc 4-stroke
Brand: Blue Line

Model Fitment

Engine	Kit Size
GY6 139QMB / 139QMA (50cc 4-stroke)	50mm bore, 81cc big bore kits

139QMB engines are based on Honda's GY6 design and are used by many Chinese 50cc scooter brands. Check the engine code on your engine case and confirm that your cylinder bore is 50mm before ordering. This set won't fit the stock 39mm bore or 52mm+ kits.