Cvk Pilot Jet (# 30) for Scooters & Mopeds

Cvk Pilot Jet (#30) for Genuine Buddy Scooters and GY6 Bikes

This Cvk Pilot Jet (#30) is made for Genuine Buddy scooters and a range of 139QMB and GY6 motorcycles fitted with CVK or PWK carburetors. It controls how much fuel reaches the engine, which affects performance and how quickly the throttle responds. It belongs to the group of scooter carburetors & jets that can noticeably change how a vehicle runs. Getting the jetting right takes careful thought and adjustment, so consult jetting guides for recommended methods.

Build and Fit

The pilot jet uses the Keihin round design and has an M6x0.75 thread. Its overall length is 28mm, allowing it to sit properly in compatible carburetor setups. It is intended for several engine codes, so it suits a wide selection of scooters and mopeds.

Signs It May Need Changing

If acceleration feels slow or the throttle reacts poorly, the current jet may not be delivering enough fuel. Keeping scooter carburetors maintained helps the engine run at its best. When tuning a scooter for more performance, small changes to the jetting can make a clear difference.

Specifications

• Type: Keihin round-style main jet
• Thread Size: M6x0.75
• Overall Length: 28mm
• Fits: Buddy scooters, plus 139QMB and GY6-style 50cc/80cc

Fitment

Fits:

• Buddy scooters
• 139QMB-based 50cc/80cc engines (139QMA, 139QMB, 1P39QMB, 1P39QMA-2, YN139QMB, JJ1P39QMB, 139FMA-2, BD1P39QMB, BN139QMB, 147QMD, other QMA and QMB models)
• 157QMJ-based 125cc/150cc/169cc engines (157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A, other QMJ, QMK and QMI models)

How to choose: Compare the engine code on your engine with the list above, and confirm your carburetor is a CVK or PWK, since the pilot jet is designed for those carburetors.

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