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 drivability on hills is 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 untuned condition. Where changes are made to exhaust or cylinder, the variator must also be adapted and, where necessary, a stronger counter pressure spring fitted.
Important note: The pins of the original torque driver must not be larger than 6mm and/or must not be worn out. The Naraku tuning torque driver is a milled part with minimal tolerances to enable exact and direct shifting of the torque driver. If the original torque driver is already worn, the Naraku torque driver can no longer be fitted. In this case, we recommend using the BT12279 or NK900.40 torque driver during installation.
Our tip: Order a new torque driver at the same time! Then the complete drive train is overhauled.
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 untuned condition. Where changes are made to exhaust or cylinder, the variator must also be adapted and, where necessary, a stronger counter pressure spring fitted.
Important note: The pins of the original torque driver must not be larger than 6mm and/or must not be worn out. The Naraku tuning torque driver is a milled part with minimal tolerances to enable exact and direct shifting of the torque driver. If the original torque driver is already worn, the Naraku torque driver can no longer be fitted. In this case, we recommend using the BT12279 or NK900.40 torque driver during installation.
Our tip: Order a new torque driver at the same time! Then the complete drive train is overhauled.