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Features
- Wide CompatibilityThe CVT dirve belt fits 4 stroke 49cc 50cc GY6 139QMB 1P39QMB engines
- Specification669-18-30 means length:669mm, width:18mm, angle:30mm
- Long-Lasting Drive BeltAside from having excellent heat dissipation properties, this serrated drive belt stands up well against wear and tear.
- Premium Four Layer MaterialsThe drive belt is wrapped with high wear-resistant nylon fabric on tooth surface, which makes less noise and improves transmission efficiency. Middle layer is high strength chloroprene rubber. Solid aramid cord and more thick rubber will prevent rapid breakage of the ATV Belt.
- Easy InstallationInstalling this belt wont take all day. Please refer to the video for the steps on how to install the belt.
Description
High-Performance CVT Drive Belt 669x18x30 | Precision Replacement for GY6 50cc Engines Exact Fit Replacement: OE-Equivalent to Belt 669 18 30 Optimal Dimensions: 669mm Length × 18mm Width × 30mm Tooth Pitch Direct replacement for Chinese 49cc-50cc GY6 139QMB/1P39QMB engines Premium Construction: Heat- resistant rubber compound for extended durability Precision-molded teeth ensure smooth power transmission Reinforced fiber core prevents stretching under load Vehicle Compatibility: Scooters: Roketa, Taotao, Baja, JMStar, Jonway, Vespa Engine Types: 4-Stroke 49cc/50cc Long Case Variants Applications: Mopeds, ATVs, Go-Karts, Small Engine Transmissions Package Includes: 1 x Heavy-Duty CVT Drive Belt (Ready to Install) Critical Maintenance Notice: Proactive belt replacement prevents costly transmission damage! Inspect every 500 operating hours Replace immediately if cracks/chunking appear Always verify measurements before installation 4-Step Belt Selection Guide: Identify Pulley Series - Match OEM specifications Measure Driven Pulley OD - Use calipers for accuracy Determine Center Distance - Engine crankshaft to jackshaft (mm) Cross-Reference Chart - Match OD + CD to belt PN Installation Alert: Clean pulley grooves before installation Verify proper belt seating in V-grooves Check tension per manufacturer specs Break-in period: Avoid full throttle for first 15 minutes Why Choose Our Belt? CNC- calibrated manufacturing tolerances (±0.3mm) 30% thicker sidewalls vs generic competitors Pre-lubricated for immediate smooth operation ISO 9001-certified production facility Final Check: Compare your old belt's stamped numbers and measure twice to ensure perfect fitment. Contact our technical team for compatibility verification.
Brand: MTATCN
Material: Neoprene, Nylon
Product Dimensions: 26.34"L x 0.71"W
Belt Style: V Belt
Compatible Devices: ATV, Scooter
Brand Name: MTATCN
Number of Items: 1
Manufacturer: Qiufadong
UPC: 750076261460
Style Number: QC123
Part Number: QC123
Compatible Devices: ATV, Scooter
Item Dimensions L x W: 26.34"L x 0.71"W
Top Width: 18 millimeters
Belt Style: V Belt
Color: Black
Material Type: Neoprene, Nylon
Frequently asked questions
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