Cvk Main Jet (# 100) for Scooters & Mopeds

Cvk Main Jet (#100) for GY6 Scooters and Mopeds

The Cvk Main Jet (#100) suits GY6 scooters and mopeds running carburetors between 17.5mm and 24mm, such as the Dellorto SHA and PHBG. It controls how fuel is metered, which can help your ride run more smoothly and efficiently. You'll find it alongside other scooter carburetors & jets in our range. Note that this jet will not work with PHVA carburetors, and getting the jetting right often takes some trial and adjustment, so check the available guides for help.

Construction and Design

This main jet uses a Keihin round-style body, so it works with a range of engine setups. The thread is M5x0.75 and the overall length is 8mm, which gives a precise fit for the intended applications. It is built to strict quality standards for dependable use on your scooter.

When to Replace Your Main Jet

A new main jet may be worth fitting if your scooter's performance has dropped off, or if you have changed the engine. Many riders adjust jetting to get their carburetor running just right, so changes like this are routine. Regular checks during maintenance can show whether it's time to swap the jet.

Specifications

• Type: Keihin round-style main jet
• Thread Size: M5x0.75
• Overall Length: 8mm
• Fits: GY6-type 125cc, 150cc and 169cc engines with CVK-style or Dellorto SHA/PHBG carburetors (17.5mm-24mm)

Fitment

Fits:

• GY6 / QMB-powered scooters with 125cc, 150cc or 169cc engines (engine codes 157QMJ, 161QMK, 152QMI, 1P61QMK, YN1P57QMJ, 1P52FMI, 154FMI, JJ157QMJ, 1P57QMJ, BN157QMJ, BN161QMK-A, other QMJ/QMK/QMI)
• Any engine with a QM or FM engine code and a 5mm main jet slot carburetor

How to choose: Confirm your carburetor has a 5mm main jet slot, then use this M5x0.75 thread, 8mm long jet. It is not compatible with PHVA carburetors.

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