Atv Starter Drive Assembly Fit For GY6 49cc 50cc 4-stroke 139QMB Scooter Moped

ATV Starter Drive Assembly for GY6 49cc 50cc 4-Stroke 139QMB Scooter Moped

This starter drive assembly is a direct-fit replacement component that engages the flywheel to spin the engine on GY6 49cc and 50cc 4-stroke scooters and mopeds, and it serves as a dependable substitute for the stock starter drive on 139QMB-based machines.

Overview

This starter drive assembly is built to replace a worn or stripped starter clutch drive on GY6 49cc and 50cc 4-stroke scooters and mopeds. It transmits turning force from the starter motor to the engine so the motor fires reliably on 139QMB-equipped machines. Riders, mechanics, and small-engine rebuilders use this starter drive assembly for routine repairs and rebuilds.

Built For Performance

• Hardened steel gear teeth resist wear from repeated starting cycles
• One-way drive engages the flywheel while allowing free spin once the engine runs
• Machined to fit GY6 139QMB starter drive housings directly
• Roller and spring internals built to hold torque under load
• Drop-in replacement design that follows the original mounting layout

Fits These Machines

• for GY6 49cc 4-stroke scooters
• for GY6 50cc 4-stroke scooters
• for 139QMB engine mopeds
• for 139QMB engine scooters

On-The-Job Use

• Replacing a starter drive that slips or fails to engage
• Top-end and bottom-end engine rebuilds on GY6 scooters
• Routine maintenance for daily commuter mopeds
• Shop repairs on 139QMB-equipped machines

Specs At A Glance

Good To Know

Q: Will this starter drive fit my scooter? A: It is made for GY6 49cc and 50cc 4-stroke machines using the 139QMB engine, so check your engine code before ordering. Q: Do I need any other parts to install it? A: Installation commonly calls for a new gasket or seal at the starter drive cover, and it is wise to inspect the starter motor and flywheel teeth at the same time.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.