Naraku CVT KIT (139QMB)
Description: Complete Naraku CVT KIT, all tuned to another. Since Chinese-built scooters are not upgraded with top-end components out of the factory, this is the easiest way to overhaul the transmission without expert help. This negates any restrictors. Top speed and drivability on hills are improved, meaning higher top end and better acceleration! This Naraku Performance kit is made for the following engines 139QMB, Buddy50, RoughHouse, and many another GY6 50cc base engine!
Belt Included: Choose from either belt length 669x18x30mm, 729x18x30mm or 788x18x30mm in the menu included as part of the kit. The 669mm length belt is for short case engines that use a 10" rear wheel. The 729mm length belt is for long case engines use a 12" rear wheel. The 788mm length belt is for extra long case engines, like are found on the Maddog 50cc Ruckus clone. Recommendations: Use the new belt in this kit.
NOTE: Must re-use stock variator fan overlay, kickstart him, washers, clutch back-ramp plate, clutch nut, and nuts. RoughHouse must re-use drive face and belt-size 738-18-30 (sold separately). Recommendations: Use graphite or moly grease when assembling. Most parts also will fit Honda DIO's CVT.
Installation: Make sure variator drive face is seated properly and not get its teeth chewed by the bendix or variator shaft splines: 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 existing variator fan, kick start gear, washer, and hand-tight nut. 4. Finally, torque nut to 30-35ft lbs. For reassurance please consult your manufacturer variator torque specs.
100% Naraku Products – NO SUBSTITUTE.
Includes the following Variator, Variator boss, Variator drive face, Belt, Belt pulley, Clutch and Clutch bell.
1. Includes Naraku Drive Face HS-CNC V.2, Drive Face
• Aluminum CNC Machined Anodized Drive Face
• Splines: 26 / I.D: 13mm<15mm / O.D: 113.7mm
2. Includes Naraku Variator 88mm Sport Black, Roller weights, Variator boss, Variator housing, Variator slides, and Variator top.
• 1x Alumin-Alloy Housing Black Coated / I.D: 20mm O.D: 88mm H: 31.65mm
• 1x Stainless Steel Boss Length: 38mm / I.D: 14mm / O.D: 19.9mm
• 1x Metal Top I.D: 14mm / O.D:73.3 / H:13mm
• 6x Black Roller Weights: 16x13mm 6g
• 3x Plastic Red Slides
3. Includes Naraku Secondary Slider, slider (torque driver) and O-rings.
• Slider Funnel ID: 30mm / OD: 43.10mm / H: 47mm
• Slider Plate OD: 118mm
4. Includes Naraku Clutch 107mm Performance Sport, Clutch housing, Clutch springs, and Clutch weights.
• Clutch O.D.: 104.6mm H: 30mm
• 3x 2000rpm Clutch Spring (red)
• 3x Clutch Spring Weights
5. Includes Naraku Clutch Bell, Clutch bell.
• Iron Clutch Bell: ID: 108mm / O.D: 119mm / H: 38mm
• Splines: 22 / I.D: 11<12mm / O.D: 20mm / H: 24.77mm
6. Includes Naraku CVT Drive Belt Sizes: (choose one)
• 669-18-30 CVT Drive Belt (QMB shortcase)
• 729-18-30 CVT Drive Belt (QMB longcase)
• 788-18-30 CVT Drive Belt (QMB XLongcase)
• Fit Dowel Pin Set (8x14mm)
• Fit QMB 49/50cc+
Supported Models: GY6 139QMB 49cc-50cc engines, Buddy50, Filly 50, Kymco, Peugeot, Piaggio, QLink, RoughHouse, SYM, TaoTao, and virtually any scooter engine with these measurements.
Item Weight & Package Dimensions:
• 6.96 pounds | 19.75" (L) x 18.25" (W) x 4.75" (H)
- Stock: In Stock
- Brand: Naraku
- Reward Points: 8
- Model: KIT.A.139QMB
- Weight: 6.96lb
- Dimensions: 19.75in x 18.25in x 4.75in
- SKU: 137-1
- MPN: KIT.A.139QMB