GY6 50cc (139QMB) CVT Cover (Standard Length) (Economy)

GY6 50cc CVT Cover for 139QMB Bikes

This left-side CVT cover suits 139QMB scooters that run 10-inch rear wheels. It serves as a dependable stand-in for the original transmission cover and helps your scooter's drive system run as it should. It is one of the GY6 50cc scooter parts worth checking if your efficiency is slipping. If your current cover is cracked or worn out, this one is a good fix.

Build and Fit Details

This cover is a standard length unit made for most scooters with 139QMB engines. It has ten mounting points in total: eight bolt holes and two dowel holes, which keep it snug once installed. It is intended for 50cc and 80cc engines and works as a straight swap for the cover already on your scooter.

Fitting Preparation

The gasket, hose clips, dowels, bolts, and kickstart mechanism do not come with this cover, so you will need to buy them separately. Gather every part before you start the job so the replacement goes smoothly.

Specifications

• Overall Length: 15.75 inches
• Total Mounting Holes: 10
• Bolt Holes: 8
• Dowel Holes: 2
• Fits: GY6 139QMB 50cc and 80cc engines with 10-inch rear wheels (standard length CVT cover, left side)

Fitment

Fits:

• 139QMB-based 50cc and 80cc engines, codes 139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD (10-inch rear wheels)
• Other QMA and QMB engines (10-inch rear wheels)
• Engines with codes containing QM or FM (10-inch rear wheels)

How to choose: Confirm that your engine code includes QM or FM and that your scooter rides on 10-inch rear wheels. The cover is standard length at 15.75 inches overall.

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