NOVINO Carburetor Jet Kit for PWK CVK PE – 40PCS Brass Main & Pilot Jets, Multi‑thread Fit

NOVINO 40PCS Carburetor Jet Kit supplies a full range of brass main and slow pilot jets tailored to PWK, CVK and PE-type carburetors for precise fuel tuning.

This kit groups 30 main jets and 10 slow pilot jets in common sizes, with three thread fits to match a wide range of small-engine carburetors. All pieces are solid brass for corrosion resistance and straightforward installation; the set covers popular jets used on scooters, ATVs, karts and GY6-based motorcycles so you can dial fuel delivery for different displacements and modifications.

Which carburetors and engines will these jets fit?

The NOVINO kit is made for PWK, CVK and PE-style carburetors and fits many OKO, KOSO, Stage-6 and Polini components. It’s designed to work with typical small-displacement machines such as 125cc–250cc scooters, ATVs and karts, but thread sizes vary so check compatibility before ordering.

• Fits PWK, CVK, PE-type carburetors and many OKO/KOSO models
• Suitable for 125cc, 150cc, 200cc and 250cc GY6 engines and similar
• Not compatible with CV, VE and CVK carburetors above 30 mm throat diameter

What sizes and thread types are included?

The kit contains both slow pilot jets (#32–#55) and two groups of main jets (#100–#140 and #155–#178), each with specific thread pitches and nut diameters. This gives tuners the range needed to lean out or richen mixtures across common carburetor throat sizes.

• Slow pilot jets: #32, 35, 38, 40, 42, 45, 48, 50, 52, 55 — thread 6 x 0.75 mm, length 28 mm
• Main jets group 1: #100–#140 (10 sizes) — thread 4.7 x 2.5 mm, nut Ø 5.7 mm
• Main jets group 2: #155–#178 (10 sizes) — thread 5 x 0.8 mm, thread length 5 mm, nut Ø 6 mm

How will this kit help with tuning and performance adjustments?

Having a broad selection of jets lets you experiment to find optimal air–fuel mixtures after modifications like different exhausts, air filters or altitude changes. Swapping to a slightly larger or smaller main or pilot jet is a primary way to correct lean or rich running without costly parts changes.

• Switch main jets for high-speed or load-related fueling changes
• Adjust slow pilot jets to refine idle, low-throttle response and off-idle behavior
• Saves time by offering many step sizes for trial-and-error tuning

What are the build quality and package details?

Jets are machined from solid brass for durability and stable thread engagement; brass also resists corrosion in fuel-exposed environments. The kit ships with 40 total pieces: 30 main jets and 10 slow pilot jets, each size intended for quick identification during tuning sessions.

• 40 brass jets: 30 main jets + 10 slow pilot jets
• Precise machining for consistent thread fit and flow orifice sizes
• Replaces common part numbers used in aftermarket carburetor kits

Who is this for: the NOVINO 40PCS Carburetor Jet Kit is aimed at mechanics, racers and DIY enthusiasts who tune small-displacement engines — scooters, ATVs, karts and light motorcycles — and need a comprehensive, cost-effective selection of jets to match different carburetors and riding conditions. If you frequently modify intake or exhaust components, ride across varying altitudes, or rebuild carburetors, this kit gives the range and thread variety required to test and set the correct fuel delivery.