QMB139 / GY6 50cc Scooter Parts
QMB139, 139QMB, and GY6 50cc are closely related terms used for many common 50cc four-stroke scooter engines and parts. Many Chinese, Taiwanese, and private-label scooters use this engine family or a closely related version.
Use this guide to find common 50cc scooter parts, including carburetors, CVT belts, variators, roller weights, clutches, gaskets, filters, cables, ignition parts, electrical parts, and engine components. Because 50cc scooters can vary by engine case, connector style, model year, and manufacturer, always compare your original part, engine code, photos, dimensions, and product fitment notes before ordering.
50cc Fitment Guide
QMB139 and 139QMB usually refer to the common 50cc GY6-style four-stroke engine family. GY6 50cc is often used as a broader customer-facing term for the same general type of 50cc four-stroke scooter engine and related parts.
Some 50cc scooters are not GY6/QMB139. They may use Minarelli-style two-stroke engines, Honda-style engines, Yamaha-style engines, or model-specific parts. Always verify the product page details before ordering.
Fitment information is based on manufacturer and supplier data. Listed applications are common known matches and may not include every compatible scooter.
Popular QMB139 / GY6 50cc Scooter Parts
Browse commonly matched 50cc scooter products for QMB139, 139QMB, and GY6 50cc-style applications. Always confirm product page fitment notes, photos, measurements, and original part details before ordering.
Carburetors & Intake Parts
Showing 12 featured products out of 73 matched products in this section.
Belts, Variators & CVT Parts
Bando 723-17.5-28 CVT Drive Belt – 139QMB Long Case 50cc
SKU: 106-108
$40.68
Matched: QMB139 / 139QMB fitment
Blue Line CVT Cover (Standard Length); 139QMB
SKU: 1100-1312
$50.96
Matched: QMB139 / 139QMB fitment
Blue Line CVT Cover Gasket – Short Case 139QMB Scooters
SKU: 1100-4056
$15.75
Matched: QMB139 / 139QMB fitment
Blue Line CVT Drive Belt 669 18 30; 139QMB, GY6 50
SKU: 1200-1187
$21.50
Matched: QMB139 / 139QMB fitment
Blue Line Drive Belt (729×17.7×30); 139QMB Long Case
SKU: 1200-1242
$22.95
Matched: QMB139 / 139QMB fitment
Blue Line Variator Assembly; 139QMB, Genuine 50, Tao Tao
SKU: 1100-1315
$39.15
Matched: QMB139 / 139QMB fitment
Complete Variator Assembly.; CSC go., 139QMB Scooters
SKU: 1200-4005
$57.57
Matched: QMB139 / 139QMB fitment
Dr. Pulley 16×13 Sliding Roller Weights
SKU: 169-217
$0.00 – $30.43Price range: $0.00 through $30.43
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 57 matched products in this section.
Clutch Parts
Air Filter Bellow Tube Assembly; CSC go., 139QMB Scooters
SKU: 1300-4001
$16.61
Matched: QMB139 / 139QMB fitment
Clutch Gear Assembly (Includes Crankshaft Gear); VMA, VMB
SKU: 110670
$118.36
Matched: QMB139 / 139QMB fitment
Complete Clutch and Bell Assembly; CSC go., 139QMB Scooters
SKU: 1200-4000
$75.93
Matched: QMB139 / 139QMB fitment
Complete Short Case Engine (139QMB); CSC Bella
SKU: 1100-4100
$567.06
Matched: QMB139 / 139QMB fitment
Cylinder and Piston Kit; CSC Bella, Pug, Nitro Sport
SKU: 1100-4102
$79.03
Matched: QMB139 / 139QMB fitment
Dr. Pulley HiT Clutch (22spline, 107mm) 139QMB, Kymco
SKU: 1200-1177
$281.73
Matched: QMB139 / 139QMB fitment
Front Brake Disc Bolt; CSC Bella, Pug, Nitro Sport
SKU: 1000-4115
$12.32
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 39 matched products in this section.
Engine Parts & Gaskets
50cc 4T Complete Engine, CSC go., 139QMB Scooters
SKU: 1100-1251
$582.75
Matched: QMB139 / 139QMB fitment
Air Injection Valve; CSC go., 139QMB Scooters
SKU: 0500-4000
$41.54
Matched: QMB139 / 139QMB fitment
Asso, Piston (47.6, 3rd Oversize); V9A Small Pin
SKU: 98190A
$90.54
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 342 matched products in this section.
Electrical & Ignition Parts
Blue Line Ignition Kit w/ CDI & Ignition Coil – GY6 125/150
SKU: 1100-1199
$36.27
Matched: QMB139 / 139QMB fitment
Blue Line Key and Ignition Set (Type 1); GY6, 139QMB
SKU: 0800-1155
$29.51
Matched: QMB139 / 139QMB fitment
Blue Line Key and Ignition Set (Type 2); GY6, 139QMB
SKU: 0800-1156
$38.42
Matched: QMB139 / 139QMB fitment
Blue Line Left Brake Switch (2 Wire, 11" Leads); GY6, 139QMB
SKU: 0800-1151
$12.99
Matched: QMB139 / 139QMB fitment
Blue Line Left Hand Switch & Brake Lever for GY6/139QMB
SKU: 0800-1103
$33.87
Matched: QMB139 / 139QMB fitment
Blue Line Relay and Starter Solenoid; GY6, 139QMB
SKU: 0900-1111
$19.32
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 68 matched products in this section.
Brakes, Cables & Controls
Blue Line Brake Lever (Disc, RH); GY6, 139QMB
SKU: 0800-1152
$15.69
Matched: QMB139 / 139QMB fitment
Blue Line Front Brake Hose (40"); GY6, 139QMB
SKU: 0800-1149
$25.14
Matched: QMB139 / 139QMB fitment
Blue Line Left Hand Drum Brake Lever w/ paddle; 139QMB
SKU: 0800-4127
$19.19
Matched: QMB139 / 139QMB fitment
Blue Line Rear Brake Cable (78"); GY6, 139QMB
SKU: 0800-1150
$19.32
Matched: QMB139 / 139QMB fitment
Brake Shoe Anchor Pin Nut (M8); CSC go., 139QMB Scooters
SKU: 1100-4050
$11.45
Matched: QMB139 / 139QMB fitment
Brake Shoe Anchor Pin O Ring (7.5×1.5); CSC go., 139QMB Scooters
SKU: 1100-4049
$11.45
Matched: QMB139 / 139QMB fitment
Brake Shoe Anchor Pin; CSC go., 139QMB Scooters
SKU: 1100-4048
$12.32
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 46 matched products in this section.
Filters, Exhaust & Maintenance
Air Filter Bolt (M6×30); CSC go., 139QMB Scooters
SKU: 1300-4002
$11.45
Matched: QMB139 / 139QMB fitment
Blue Line Fuel Line (3/16 ID, 39"); GY6, 139QMB
SKU: 1300-1152
$14.23
Matched: QMB139 / 139QMB fitment
Blue Line Fuel Sending Unit (3 Tab); GY6, 139QMB
SKU: 1300-1161
$17.87
Matched: QMB139 / 139QMB fitment
Blue Line Fuel Sending Unit (4 Bolt); GY6, 139QMB
SKU: 1300-1158
$17.13
Matched: QMB139 / 139QMB fitment
Blue Line In-line Fuel Filter (3/8" Fittings); GY6, 139QMB
SKU: 1300-1108
$12.78
Matched: QMB139 / 139QMB fitment
Blue Line Oil Seal (27x42x7mm) – GY6 125/150cc & 50cc 139QMB
SKU: 1100-1320
$11.45
Matched: QMB139 / 139QMB fitment
Complete Air Filter Assembly.; CSC go., 139QMB Scooters
SKU: 1300-4000
$44.64
Matched: QMB139 / 139QMB fitment
Complete Oil Pump Assembly; CSC go., 139QMB Scooters
SKU: 1100-4046
$21.77
Matched: QMB139 / 139QMB fitment
Exhaust Flange Nut (M6); CSC go., 139QMB Scooters
SKU: 0300-4030
$12.32
Matched: QMB139 / 139QMB fitment
Exhaust Heat Shield (Black); CSC go., 139QMB Scooters
SKU: 0500-4004
$26.07
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 49 matched products in this section.
Other Compatible Parts
Back Inner Legshield; CSC go., 139QMB Scooters
SKU: 0300-4055
$61.26
Matched: QMB139 / 139QMB fitment
Blue Line M12 Washer 24mm OD – CSC go., 139QMB Scooters
SKU: 1600-4001
$11.11
Matched: QMB139 / 139QMB fitment
Blue Line Rear Axle, Output Shaft, Final Drive Shaft; 139QMB
SKU: 1100-1324
$34.33
Matched: QMB139 / 139QMB fitment
Blue Line Rocker Arm Assembly (Type 2, 69mm); 139QMB
SKU: 1100-1451
$25.86
Matched: QMB139 / 139QMB fitment
Blue Line Turn Signal Bulb (12V, 10W, Orange); GY6, 139QMB
SKU: 0900-1105
$12.05
Matched: QMB139 / 139QMB fitment
Blue Line Vacuum Line (36"), ID 4.3mm); GY6, 139QMB
SKU: 1300-1153
$12.78
Matched: QMB139 / 139QMB fitment
Showing 12 featured products out of 197 matched products in this section.
Common Questions
Are QMB139, 139QMB, and GY6 50cc the same thing?
They usually refer to the same general 50cc four-stroke scooter engine family. QMB139 and 139QMB are common engine-code references, while GY6 50cc is often used as the broader customer-facing term.
Will GY6 50cc parts fit every 50cc scooter?
No. Many 50cc scooters use GY6/QMB139-style engines, but some use two-stroke Minarelli-style engines, Honda-style engines, Yamaha-style engines, or model-specific parts.
What should I check before ordering 50cc scooter parts?
Check your engine code, original part number, belt size, connector style, dimensions, mounting points, product photos, and fitment notes.
Why do some 50cc scooter parts fit many brands?
Many scooter brands use similar GY6/QMB139-style engines and components, but production differences can still affect exact fitment.