Skip to product information
Please Note: Does Require Pressing The Gears Off The Shaf
Average Top Speed Gain on Flat Ground is 7 to 10 mph (Depends on other Modifications on your Bike
These Are Great Addition for The 139QMB 4 Stroke 50cc Chinese Scooter and ATV Engines with Standard or Big Bore Kit.
52T-15T Performance Final Drive Gear for GY6 49cc 50cc 139QMB Chinese Scooters
$57.98
Scooter Final Drive Gear Set for GY6 49cc 50cc 139QMB Engine
Please Note: Does Require Pressing The Gears Off The Shaf
Gear ratio is a 15/52T
Average Top Speed Gain on Flat Ground is 7 to 10 mph (Depends on other Modifications on your Bike
These Are Great Addition for The 139QMB 4 Stroke 50cc Chinese Scooter and ATV Engines with Standard or Big Bore Kit.








🚚 Shipping: Items ship within 1-3 business days.
🔧 Warranty: 1-year warranty included.
🔄 Returns: 30-day return policy.
Images are for reference only.