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Cylinder Head

Stock parts for 49cc/50cc 4-stroke QMB139 engines. This engine is the most popular 50cc 4-stroke engine used in Chinese scooters.
Product Image Item Name- Price
50cc, 4-Stroke Cylinder Head

Cylinder Head for 50cc 4-stroke QMB139 ...

$39.99
Carb Insulator Gasket

Carburetor Insulator Gasket for 50cc 4-...

$2.99
Cylinder Head Gasket Type-1

Various unlisted makes/models, QMB139 5...

$5.99
Cylinder Head Gasket Type-2

Cylinder Head Gasket Type-2 for 50cc 4-...

$5.99
Exhaust Valve

Exhaust Valve for 50cc 4-stroke QMB139 ...

$7.99
Inner Valve Spring

Inner Valve Spring for 250cc 4-stroke w...

$2.49
Intake Manifold O-ring

Intake manifold O-ring Gasket for 50cc,...

$0.99
Intake O-ring

Intake to Cylinder Head O-ring size 17....

$0.99
Intake Valve

Intake Valve for 50cc 4-stroke QMB139 e...

$7.99
NGK CR7HIX Iridium Spark Plug

NGK CR7HIX Iridium Performance spark pl...

$9.99
NGK CR7HSA Spark Plug

NGK CR7HSA spark plug for various makes...

$2.99
Outer Valve Spring

Outer Valve Spring for 50cc 4-stroke QM...

$2.99


New Products For July - FULL-SIZE SCOOTERS PARTS

Valve Guide

Valve Guide for 50cc 4-stroke QMB139 en...

$4.99
Valve Guide O-ring

Valve Guide O-ring for 50cc 4-stroke QM...

$0.99
QMB139 and GY6 50cc, 125cc, 150cc Exhaust Gasket

Exhuast Pipe Gasket for QMB139 4-stroke...

$2.99
Inner Valve Spring

Inner Valve Spring for 250cc 4-stroke w...

$2.49
Valve Keepers

. Valve Keepers for 250cc 4-stroke wate...

$1.49
50cc, 4-Stroke Cylinder Head

Cylinder Head for 50cc 4-stroke QMB139 ...

$39.99