GY6 50cc (139QMB) Long Case Scooter Air Filter

GY6 50cc Long Case Scooter Air Filter for 139QMB Engines

This air filter is made for GY6 50cc long case scooters and works with engines such as the 139QMB and QMB139. Its dual-stage filtration keeps air flowing properly so the engine can perform as it should. It is a direct swap for the original and is one of the GY6 50cc scooter parts that helps restore airflow and supports a longer engine life. Keeping the intake air clean has a direct effect on how your scooter runs.

Construction and Design

One side of the filter uses a foam layer, and the other side uses a red pleated paper element. Together these two layers trap dirt and debris while still letting enough air through. The filter is a cartridge type with a black plastic frame, so it slides into the airbox without much fuss.

Replacement and Maintenance

Replacing the air filter on a regular schedule helps the engine run well and last longer. Reduced power or higher fuel use can be a sign that the filter needs checking or swapping out. To get the best results, pick a filter that matches the stock shape and dimensions, since the correct fit is important for keeping intake air flowing properly.

Specifications

• Type: Plastic cartridge with foam and paper element
• Overall Length: 11 1/8" (280mm)
• Engine: 139QMB / QMB139 50cc 4-stroke, long case
• Fits: 139QMB / QMB139 50cc 4-stroke GY6 scooters with long case engines (12-inch wheels, 729 belt)

Fitment

Fits:

• 139QMB / QMB139 50cc 4-stroke, long case (12-inch wheels, 729 belt)
• Baja, BMS (Boreem), Panterra, Qingqi, Roketa, SUNL, Tank, Vento and other Chinese 50cc scooters (long case)

How to choose: Check that the engine code on your case reads 139QMB or QMB139, and confirm you have a 729 drive belt and 12-inch wheels. Short case engines with 10-inch wheels require a different filter.

Shop more: GY6 50cc Scooter Parts (139QMB) · GY6 Scooter Parts · Scooter Air Filters · Scooter Parts