Bando CVT Belt 669-18-30 (139QMB shortcase)
1P39QMB shortcase / Tire Size 3.50-10" Rim
Description: Bando Brand Premium CVT Drive Belt size 669-18-30 is made in Japan, not China's version. Its material used is Nylon previously used in making bulletproof vests. Nylon strong yet it's flexible, not harsh on aluminum drive face like "Kevlar" which are recommended for heavier duty off-road applications. Nylon makes it gentle on CVT recommended for everyday riding use. CVT Drive Belt size 669-18-30 commonly found on 139QMB 50cc 4-stroke ATVs and Street Scooters with a 10-inch rear wheel shortcase engine. Also fits Twist N' Go Venice 49cc, Twist N' Go LS 49cc, and Twist N' Go Milano 50 (49cc) '04-'07.
Installation: Make sure variator drive face is seated properly and not get its teeth chewed by the Bendix: 1. Slack the belt by opening the CVT clutch gives belt slack to the variator side. 2. Then install the variator drive face while lifting the slack belt further away from the center boss if done properly should not see any splines between variator drive face slop-side and boss flat-side. Should be flushed together. 3. Then install the existing variator fan, washer, and hand-tight nut. 4. Finally, apply blue Loctite, torque nut to 30-35ft-lbs. For reassurance please consult your manufacturer's variator torque specs.
NOTE: How tell if you have 139QMB longcase or shortcase? If the distance from variator nut to clutch bell nut is 8.75", then it takes a 669-CVT belt which makes it a shortcase. If the distance from variator nut to clutch bell nut is 10", then it takes a 729-CVT belt which makes it a longcase. For we can’t always tell by rim size alone, for example, if the 139QMB Scooter has a 10" rim it can be tire size 3.50-10 (use 669-CVT belt shortcase) or have a tire size 130/90-10 (use 729-CVT belt longcase).
Include the following CVT belt.
• Nylon Reinforced Material
• Length: 669mm (Loop 12.461 in.)
• Width: 18.2mm (0.717 in.)
• Height: 9mm (0.354 in.)
• Groove Angle: 30°
• Made in Japan
• Fit 10" Rear Wheel Shortcase Engine
• Fit QMB 49/50cc+
Supported Models: Naraku CVT Kit (Part# KIT.A.139QMB); GY6 139QMB 49cc-50cc engines, Baja SC50, Bintelli Breeze 50cc, Bintelli Beast 50cc, Bintelli Bolt 50cc, Bintelli Scorch, Bintelli Sprint 50cc, Buddy50, Filly 50, Kymco, Panterra Freedom 50cc, Panterra Fusion 50cc, Panterra Retro 50cc, QLink, Roketa, RoughHouse, Schwinn Hope 50, Schwinn Laguna 50, SYM, TaoTao, Twist N' Go LS 49cc, Twist N' Go Milano 50 (49cc) '04-'07, Twist N' Go Venice 49cc, Wolf Blaze, Wolf CF-50, Wolf Islander, Wolf Lucky, Wolf M1, Wolf R1, Wolf RX-50, Wolf V50, Wolf W1, and virtually any other scooter engine with these measurements.
Item Weight & Product Dimensions:
• 0.18 pounds | 13.169” (L) x 0.717” (W) x 0.354” (H)