Premium Continuously Variable Transmission CVT Drive Belt.
Replace Part Number: 669-18-30, 669 18 30
Fits 49cc 50cc GY6 QMB139 4 Stroke Engines.
Outer circumference: 669 mm ( 26.3 inch), Top width: 18 mm ( 0.7 inch), Pitch: 30 degree
Good performance: Oil and heat resistant, high mileage and reliable performance.
How to Select the Correct Comet Belt
1.Determine the Series Type
2.Measure the “Outer Diameter” (O.D.) of the driven pulley on the jackshaft.
3.Measure the “Center Distance” (C.D.); which is the exact distance between the center of the engine crankshaft and the center of the jackshaft. Must be precise.
4.Use the two measurements; the driven pulley outer diameter and center distance measurement to determine the correct belt part number from the relevant chart below.
Note:
Should your machine’s center distance fall between the center distance (C.D.) settings listed here, select from the two belts the one with the larger outside circumference (O.C.) for best wear and to avoid machine “creep” during idling.
Fitment:
OEM Part Number: 669-18-30, 669 18 30
This CVT Drive Belt for 49/50cc 4-stroke scooters commonly used with the QMB139 engines.

SPECIFICATION:
Width: 18 mm, Length: 669 mm
Material:Rubber
Color:Black
Size:Width: 18 mm, Length: 669 mm
Referenced Number:669-18-30, 669 18 30
Package Weight: Approx. 150g
Package includes: 1X Drive Belt
Spec
High Premium
Premium Drive Belt Fits for 50cc (49cc) Scooter.Fits 49CC 50CC GY6 Roketa Taotao Vespa Jonway Chinese Moped Scooter ATV Go Kart.
High Quality
Premium Belts are made for high mileage and reliability.This belt is superior performance characteristics reduce stretching and distortion and make belt long life.
High Performance
Standard CVT Drive Belt provides longer durability for high performance applications. Please make sure this is the right size for your system.
Go Kart Drive Belt
Go Kart Drive Belt
CVT Drive Belt
CVT Drive Belt
OEM Part Number
203591- Q430203W
203589, 5959
203581, 203581A
669 18 30

Series
30 Series
30 Series
20 Series
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