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GOOFIT
39mm Cylinder Block for GY6 139QMB 49cc 50cc 4-Stroke Engine
39mm Cylinder Block for GY6 139QMB 49cc 50cc 4-Stroke Engine
Regular price
$32.99
Regular price
Sale price
$32.99
Shipping calculated at checkout.
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Product Overview
Replacement 39mm cylinder block for compatible GY6 139QMB 49cc and 50cc 4-stroke engines used in scooters, mopeds, ATVs, and go-karts.
Designed for standard-size 39mm cylinder applications, this cylinder block is suitable for replacing a worn, scored, damaged, or otherwise unusable original cylinder when the engine dimensions match.
Constructed with an aluminum-alloy outer body and cooling-fin design for compatible air-cooled GY6 applications.
Product Compatibility
| Engine Platform | Engine Size | Application |
|---|---|---|
| GY6 139QMB | 49cc / 50cc | Scooter |
| GY6 139QMB | 49cc / 50cc | Moped |
| GY6 139QMB | 49cc / 50cc | ATV / Quad |
| GY6 139QMB | 49cc / 50cc | Go Kart |
Specifications
| Specification | Details |
|---|---|
| Product Type | Cylinder Block |
| Engine Platform | GY6 139QMB |
| Engine Type | 4-Stroke |
| Engine Size | 49cc / 50cc |
| Cylinder Bore | Approx. 39 mm / 1.54 in |
| Cooling Type | Air-Cooled |
| Outer Construction | Aluminum Alloy |
| Applications | Scooter / Moped / ATV / Go Kart |
| Replacement Type | Aftermarket |
| Condition | New |
Key Features
- 39mm Cylinder Bore: Designed for compatible standard-size GY6 139QMB 49cc / 50cc applications.
- 139QMB Engine Fitment: Suitable for selected Chinese 4-stroke scooter and small-engine platforms.
- Cooling-Fin Design: Provides surface area for heat dissipation in compatible air-cooled engines.
- Replacement Cylinder Block: Suitable for top-end repairs involving a worn or damaged original cylinder.
- Dimension-Based Fitment: Designed to be confirmed by bore size, engine code, sleeve dimensions, and mounting pattern.
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