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YGQ Keihin / Nibbi Jet Kits — PWK, FCR, PE, PJ, CVK

N424-21 · 99101-357

$9.99–$17.49 4.4 (157)

Seven Keihin-pattern sets for PWK, PWM, FCR, PE, PJ and CVK carbs on dirt bikes, ATVs and scooters: a 43-piece and a 24-piece main-and-pilot kit, two FCR / PWK sets, slow pilot jets N424-21 and two main-jet ranges.

Choose a version: 43 pcs main + pilot

Leaves the warehouse of the store you check out with
Returns through your order page
Aftermarket part, matched to OEM numbers

What it is

Fits and features

43-pc kit: round + hex mains + pilots
24-pc compact kit
N424-21 slow pilots
Main jets 99101-357, #122–#165
PWK 28–39, PE 20–30, PJ 34–38

Specifications

Carbs: PWK, PWM, FCR, FCR-MX, PE, PJ, CVK
Bikes: Honda CRF, Yamaha YZ, Kawasaki KX, KTM
Also: GY6 125 / 150 scooters
Use: Re-jetting and spares

Shop tip

Clean the jet threads and use a flat screwdriver that fills the slot; brass jets strip easily.

Owner reviews

4.4 out of 5 from 157 ratings

July 29, 2026
Nice assortment for tuning Mikuni and clone carburetors
Excellent assortment of main and pilot jets for tuning gy6 and other Mikuni, Nibbi or other power sports carburetors
Calvert S.
April 26, 2025
Cool but...
Its very fragile and breaks when trying to unscrew but works like a charm i guess
Ethan m.
August 24, 2026
Se ajusta muy bien y cumple mis necesidades
Ayuda a calibrar mejor la relación interna del carburador, sacando mejor rendimiento
Denis J.
October 24, 2025
Very good stuff
Great product very good assortment. Worked perfectly for tuning my carburetor.
tim h.

YGQ Keihin / Nibbi Jet Kits — PWK, FCR, PE, PJ, CVK

What it is

Fits and features

Specifications

Owner reviews

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