Carburettor Main Jet – M3 Type, for 50cc Scooters (QMB139 / GY6)
Condition: new
Type: M3 spray nozzle / main jet
Thread diameter: 3.5mm metric
Product reference: BTS-721.03.47
Replaces OEM: 7210347, 44-031/84-10
Sold in packs of 5
Fits
Many 50cc 4-stroke scooter carburettors of the QMB139 / GY6 type, including YY50QT-8, LF50QT8A, LJ50QT-E, J50QT-6A, BT49QT-9R1, BT49QT-2C, BT49QT-12A1, BT49QT-7A1, YY50QT, YY50QT-2, JJ50QT-21, JJ50QT-27 and LB50QT-15.
Before ordering: check the jet size and thread against your own carburettor. Jet sizing affects how the engine runs — fitting the wrong size will make it run lean or rich.
Aftermarket part. No fitting instructions included; professional installation is recommended.
