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Transmission Power Pack, Naraku for 50cc 4-Stroke 139QMB Scooters

List Price: $249.99
Sale Price: $219.99

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Naraku Transmission Upgrade Kit for 50cc 4-Stroke 139QMB Chinese Honda-Cloned Scooters

  • Variator Kit
  • 107mm Clutch Assembly
  • 669, 729 or 788 Belt

  • BMS - Apache 50 4T, Heritage 50 4T
  • Diamo - Classic 50 4T
  • Lance - Charming 50 4T, GTR 50 4T
  • Roketa - Bahama 50 4T, Maui 50 4T, Sicily 50 4T
  • Tank - Urban 50 4T, Sporty 50 4T, Viaggio 50 4T
  • Many Other 50cc 139QMB Based Engines

Complete transmission kit of Naraku components, all tuned to another. Since Chinese-built scooters are not kitted 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 driveability on hills are improved, meaning higher top end and better acceleration!

Kit contains: variator, variator sleeve, belt, belt pulley, clutch and clutch bell. Suitable for all 4-stroke scooters with 139QMB engines with a belt length of 669mm. Kit for scooters in un-tuned condition. Where changes are made to exhaust or cylinder, the variator must also be adapted and, where necessary, a stronger counter pressure spring fitted.

Naraku Super Transmission Kit for 50cc QMB139 engines. The 669mm length belt is for short case engines that use a 10" rear wheel. The 729mm belt is for long case engines with 12" rear wheel. The 788mm length belt is for extra long case engines, like are found on the Maddog 50cc Ruckus clone.

**NOTE: Please make sure your scooter uses the 669, 729 or 788 belt.


**NOTE: Electrical, High Performance, Aftermarket items are non-returnable, please check photos and specifications before ordering.

Please see our Warranty and Returns Policy
Manufacturer: Naraku
Manufacturer Part #: 137-1

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