Performance GY6 50cc Scooter Exhaust System
This exhaust is known to fit many QMB139 50cc scooters. In some cases this exhaust system may not just "bolt on." Some modifications to inlet pipe bracket may be required. Please verify the measurements before purchasing this exhaust. May fit other makes and models.
- Muffler length: 35.5cm [14"] including exhaust tip.
- Muffler diameter: 90mm [3.5"]
- Muffler has replaceable screw in silencer plug.
- 6 mounting holes to mount pipe to muffler. You will only use 3 bolts, but the 6 holes allow you to position the outlet pipe.
- Inlet pipe is 22" long with 4 bends. 1st bend is 4.5" from manifold, 2nd bend is another 4". A 6" run to the 3rd bend and another 6" to the muffler attachment.
- Pipe OD: 25mm [1"]
- Pipe ID: 22.5mm [.88"]
- Pipe mounting to manifold: 50mm [2"]
- To brackets on pipe as pictured
- Kit contains muffler mounting bracket.
- Kit contains muffler mounting bracket insulator.
- Kit contains exhaust pipe gasket (2.5" round, 3-hole).
- (4) bolts, (4) washers, (1) lock washer and (1) nut.
Available in several colors. This listing is for the RED one.
We don't get any exhaust assemblies that are cosmetically perfect. They all have a few "dings" and "scratches" on them from their overseas journey. If you need a perfect one, better to buy somewhere else.
- gasket paper
I loved it fit my 139qmb engine perfect thank you
Bolted right onto my 139qmb without any modifications and happy with the sound of my bike makes now
Will be doing more with you
Easy to assemble and sounds great!
It was good it fit on the moped without using the extra bracket but it didn't come with a gasket that goes between the exhaust and the engine so I had to go and buy gasket paper and make one