Performance Parts and After-Market Accessories for 49cc / 50cc 4-stroke QMB139 engine based scooters

"I have owned 5 different scooters over the years. 250cc CFMOTO, Roketa 150cc 4-stroke GY6, United Motors 50cc 2-stroke and a SunL 50cc 4-stroke QMB139. I can rest assured that no matter what make or model I have, Partsforscooters.com will always have the parts I need. You have a customer for life!"
Mike R.-California

"I can say, without hesitation, service at your company far exceeds any other of the many distributors & manufacturers I deal with on a daily basis. Prior to opening my shop I spent 23 years as a project manager & customer service manager so I set the bar high for customer service & efficiency. Good job!" Bill Randall, President Fun & Functional Transportation

Results 1-25 of 56

Performance Parts and After-Market Accessories for 49cc / 50cc 4-stroke QMB139 engine based scooters.

Hoca QMB139 4T Power Pack

Part number: 169-233

Hoca 4T Racing Kit for 50cc 4-stroke QMB139 Scooters and Engines. This kit includes everything you need to increase overall speed, horsepower and torque.

Hoca QMB139 Engine Gear Sets

Part number: 169-206

Hoca Gear Sets in a variety of combinations for 50cc, 4-stroke engines.

Hoca 50cc QMB139, Performance Cylinder Kit

Part number: 169-54

Hoca 50cc QMB139 4-stroke 50mm, Racing Big Bore Cylinder Set.

Hoca 50mm Piston Kit (*Click* for in-stock date)

Part number: 169-203

Hoca 50mm Piston Kit for the QMB139 4-stroke Big Bore Cylinder Set.

Hoca 50cc GY6/QMB139 Performance Head

Part number: 169-70

Hoca 50cc QMB139 4-stroke 50mm, performance cylinder head.

Hoca QMB139 Performance Intake Manifold

Part number: 169-275

Hoca Performance Intake Manifold for 50cc 4-stroke QMB139 engines.

Hoca QMB139 Performance CVK Carburetor (*Click* for in-stock date)

Part number: 169-276

Hoca High Performance 26mm CVK Carburetor for 50cc 4-stroke QMB139 engines. Includes electric choke and accelerator pump.

Hoca QMB139 50cc Performance Camshaft

Part number: 169-105

QMB139, 50cc 4-stroke performance camshaft.

Hoca QMB139 Performance Transmission Kit

Part number: 169-197

After-Market Performance Hoca GY6 50 Transmission Kit for QMB139 engines.

Hoca QMB139 Stroker Crankshaft

Part number: 169-239

Hoca 44mm Stroker Crankshaft Assembly for 50cc 4-stroke QMB139 engines.

QMB139 50cc, 4-stroke Performance Exhaust

Part number: 190-37

Stainless Steel After-Market Performance Exhaust for QMB139 50cc 4-stroke engines.

Hoca QMB139 Performance Cooling Fan

Part number: 169-274

Hoca Performance Cooling Fan for 50cc 4-stroke QMB139 engines.

Uni Filter Clamp-On Dual Layer Pod Air Filter

Part number: 230-35

Uni Filter Clamp-On Dual Layer Pod Air Filter

Uni Filter Long Clamp-On Pod Air Filter

Part number: 230-34

Uni Clamp-On "Pod" Filter

Uni Filter Red Filter Sheet

Part number: 230-37

Uni Filter Replacement Red Mesh Course Foam Air Filter Sheet size BF-5 12" X 16" X 3/8" 40 PPI.

Uni Air Filter

Part number: 230-36

Uni "Dual throat" pod with Eurethane end. ID: 1 5/8(42mm)-1 3/4" (46mm). This pod filter features a black Uerethane end cap, black foam element, black Uerethane snout with a stainless clamp.