Naraku CVT KIT (139QMB, Buddy, RoughHouse)
Description: Complete Naraku CVT Kit 139QMB aka Super CVT transmission kit for GY6 50cc engines, 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 restrictions. Top speed and drivability on hills are improved, meaning reaching top-end speed with better acceleration! This Naraku Performance kit is made for the following engines 139QMB, Buddy50, RoughHouse, and many other GY6 50cc base engines!
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 that use a 12" rear wheel. The 788mm length belt is for extra long case engines, like are found on the Maddog 50cc Ruckus clone.
NOTE: Must re-use stock variator fan overlay, kickstart him, washers, rear pulley plate shaft, slider pins, slider seat funnel, clutch nut, and nuts. RoughHouse must re-use the drive face and belt-size 738-18-30 (sold separately). Recommend using a new belt with this kit. Belt and the belt drive-facing plates KEEP DRY. All, other areas apply moly-graphite 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: 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.
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
• 1x Aluminum CNC Machined Anodized Drive Face
• Splines: 26 / ID: 13<15mm / OD: 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 ID: 20mm / OD: 88mm / H: 31.65mm
• 1x Stainless Steel Boss L: 38mm / ID: 14mm / OD: 19.9mm
• 1x Metal Top ID: 14.15mm / OD: 73.50mm / H: 11.58mm
• 6x Red Roller Weights: 16x13 9gm
• 3x Plastic Slides (red)
3. Includes Naraku Secondary Slider, slider (torque driver), and O-rings.
• 1x Secondary Slider Funnel ID: 30mm / OD: 43.10mm / H: 47mm
• 1x Secondary Slider Plate OD: 118mm
4. Includes Naraku Clutch 107mm Performance Sport, Clutch housing, Clutch springs, and Clutch weights.
• 1x Clutch ID: 24.3<28mm / OD: 104.6mm / H: 30mm
• 3x Clutch Spring (red): 2000 RPM
• 3x Clutch Spring Weights
5. Includes Naraku Clutch Bell, Clutch Bell PTFE Coated.
• 1x Iron Clutch Bell Vented ID: 108mm / OD: 119mm / H: 38mm
• Splines: 22 / ID: 11<12mm / OD: 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)
• Made in Taiwan
• Fit Clutch Nut: 39mm
• Fit Impact Sockets: 14mm / 17mm / 39mm
• Fit Variator Shaft Nut: M12
• Fit Clutch Shaft Nut: M10
• Fit Compression Spring: 1k, 1.5k, 2k rpm
• Fit Dowel Pin Set (8x14mm)
• Fit QMB 49/50cc+
Supported Models: Naraku ECO Kit (Part# KIT.A.139QMB.L); 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)