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Naraku QMB139 Adjustable Drive Sheave

Naraku QMB139 Adjustable Drive Sheave

$105.00
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Naraku QMB139 Adjustable Drive Sheave
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  • Naraku QMB139 Adjustable Drive Sheave
Naraku QMB139 Adjustable Drive Sheave

Naraku QMB139 Adjustable Drive Sheave

$105.00
Part number 137-30

Check dimensions and compatibility before ordering.
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Order before 2 PM Central, Monday–Friday. Holidays excluded.

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With more linear slots, Naraku's Adjustable Drive Sheave (torque driver, secondary slider) improves acceleration and top speed in bikes with 50cc 139QMB engines.

Specifications:

  • Overall Outer Diameter: 118.7mm
  • Inner Diameter: 33.5mm
  • Includes rear pulley, bearings, and nut

NOTE: If installing on a CSC go, you'll need these clutch slider pins

Model Fitment

CSC Bella Classic 50 CSC go 
CSC go MAX CSC Nitro Sport 50
CSC Pug 50  

139QMB-based 50cc / 80cc engines with the following engine codes:

139QMA 139QMB 1P39QMB 1P39QMA-2
YN139QMB JJ1P39QMB 139FMA-2 BD1P39QMB
BN139QMB 147QMD Other QMA models Other QMB models

Don't see your engine listed? If the engine code includes "QM" or "FM", this product is compatible with your vehicle.

About Naraku: NARAKU is a professional supplier of motorcycle parts from Taiwan. We’ve sold various motorcycle parts, scooter parts and accessories for more than 10 years. The quality products are sold to Europe, Asia and America. We supply engine parts and accessories for modern scooters and mopeds. With the advanced technologies and the superb quality of the products, we can offer everything your ride needs.

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