40-Piece Carburetor Main & Slow Jet Kit for PWK, CVK, PE, OKO & KOSO Carbs

Keep your scooter, ATV, or kart running at peak performance with this comprehensive 40-piece carburetor jet kit. Featuring a wide assortment of alloy metal main jets and slow jets, this kit gives you the tuning flexibility to dial in the perfect air-fuel mixture for your 125cc, 150cc, 200cc, or 250cc GY6-powered machine. Whether you're fine-tuning for a new exhaust, air filter upgrade, or altitude change, having the right jet on hand saves time and money.

Key Features

Complete Kit: Includes 40 pcs carburetor main jets + 30 pcs slow jets — a wide range of sizes in one convenient set
Durable Alloy Metal Construction: Precision-machined from quality alloy metal for consistent fuel flow and long-lasting performance
Wide Compatibility: Fits PWK, CVK, and PE type carburetors, as well as OKO, KOSO, Stage-6, Polini, and similar aftermarket carbs
GY6 Engine Friendly: Compatible with most scooters, ATVs, and karts fitted with 125cc, 150cc, 200cc, and 250cc GY6 motors
Easy Tuning: Having multiple jet sizes on hand means you can swap jets quickly to optimise throttle response and fuel efficiency

Specifications

Material: Alloy Metal
Package Contents: 40 pcs Carburetor Main Jets + 30 pcs Slow Jets
Compatible Carburetors: PWK, CVK, PE, OKO, KOSO, Stage-6, Polini & more
Compatible Engines: 125cc, 150cc, 200cc, 250cc GY6 motors
Country of Origin: Made in Mainland China

Compatible With

This jet kit is designed for use with the following carburetor types and engine platforms:

PWK Carburetors (Keihin-style)
CVK Carburetors (Constant Velocity)
PE Type Carburetors
OKO, KOSO, Stage-6, Polini Aftermarket Carbs
GY6 125cc / 150cc / 200cc / 250cc Scooters, ATVs & Karts

Important Notes

Due to different monitor settings and lighting, actual colour may vary slightly from images shown.
Please allow a 1–3 cm (approx. 0.39"–1.18") measuring deviation due to manual measurement.

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For more on carburetor tuning and small engine maintenance, visit the EPA Small Engine Emission Standards for guidance on keeping your engine compliant and efficient.

Frequently Asked Questions

Q: What carburetors are compatible with this 40-piece carburetor jet kit?

A: This jet kit is compatible with PWK, CVK, and PE type carburetors, as well as popular aftermarket brands including OKO, KOSO, Stage-6, and Polini. It fits most scooters, ATVs, and karts running 125cc, 150cc, 200cc, and 250cc GY6 motors.

Q: How many jets are included in the carburetor main jet kit?

A: The kit includes a total of 70 pieces — 40 carburetor main jets and 30 slow jets — covering a broad range of sizes so you can easily tune your carb for optimal performance.

Q: What material are the carburetor jets made from?

A: The jets are precision-machined from durable alloy metal, ensuring consistent fuel flow, accurate metering, and long-lasting reliability even under regular use and heat cycling.

Q: Why would I need different sized carburetor jets?

A: Different riding conditions, altitudes, temperatures, and engine modifications (such as exhaust or air filter upgrades) require different fuel-flow rates. Having a full assortment of jet sizes allows you to fine-tune the air-fuel mixture for the best throttle response, efficiency, and overall engine performance.