669-18-30 CVT Drive Belt for GY6 49cc 50cc 139QMB Scooter

Product Overview

Replace a worn, cracked, or stretched CVT belt with this 669-18-30 drive belt, designed for compatible GY6 139QMB / 139QMA 49cc and 50cc 4-stroke scooters and mopeds.

With a 669mm circumference, 18mm width, and 30° drive-face angle, this belt is commonly used on short-case GY6 50cc CVT transmissions, especially applications with 10-inch rear wheels.

Made from flexible reinforced rubber material, it provides a practical replacement for normal scooter CVT transmission service.

Product Compatibility

Engine / Application	Fitment Notes
GY6 139QMB	Short-case 49cc / 50cc applications
GY6 139QMA	Verify original belt size
1P39QMB	Compatible 669-18-30 applications
49cc Scooter / Moped	4-stroke short-case models
50cc Scooter / Moped	Common 10" rear-wheel applications
Chinese Scooter	Match original 669-18-30 belt marking

Specifications

Specification	Details
Product Type	CVT Drive Belt
Belt Size	669-18-30
Belt Circumference	Approx. 669 mm / 26.34 in
Belt Width	Approx. 18 mm / 0.71 in
Drive Face Angle	30°
Engine Type	GY6 139QMB / 139QMA
Engine Cycle	4-Stroke
Application	Scooter / Moped
Condition	New
Package Quantity	1 Belt

Key Features

• 669-18-30 CVT Size: Designed for compatible short-case GY6 scooter transmissions.
• 139QMB / 139QMA Fitment: Suitable for selected 49cc and 50cc 4-stroke engines.
• 18mm Belt Width: Matches common GY6 50cc CVT pulley applications.
• Flexible Reinforced Construction: Designed for regular scooter transmission use.
• Replacement Drive Belt: Suitable for replacing a worn, cracked, glazed, or stretched original belt.