YGQ Carburetor Jet Kit 43-Piece — Keihin/Nibbi-Compatible Main & Pilot Jets for Motorcycles, ATVs

The YGQ 43-piece carburetor jet kit provides a complete selection of main and pilot jets sized to tune Keihin/Nibbi-style carburetors on motorcycles, dirt bikes and ATVs for better throttle response and matched fuel delivery.

Whether you are rejetting for altitude, swapping performance parts, or restoring an older carburetor, having the right jets on hand speeds the job and avoids guesswork. This kit collects common round and hex main jets plus a broad pilot (slow) jet range to fit many Keihin, PWK, FCR and CVK-style carbs used across Honda, Yamaha, Kawasaki, Suzuki, KTM, Husqvarna and several scooter and ATV platforms.

What sizes are included and how do they cover tuning needs?

The set includes a wide selection of main jets in both small round and hex head styles, plus pilot slow jets to address low-speed fueling. That range lets you step up or down in fine increments until the carburetor breathes correctly in your riding conditions.

• Small round main jets: 90, 98, 100, 105, 108, 110, 115, 118, 120, 125, 128, 130, 135, 140, 145, 150
• Hex main jets: 100, 110, 120, 130, 140, 150, 155, 158, 160, 162, 165, 168, 170, 175, 180, 185
• Pilot (slow) jets: 30, 32, 35, 38, 40, 42, 45, 48, 50, 52, 55

Which carburetors and vehicles is this kit compatible with?

The jets are designed to suit a wide variety of Keihin/Nibbi family carbs including PWK, FCR, CVK and many CV/CVK variants. Compatibility spans motocross bikes, street bikes, scooters, ATVs and side-by-sides from major manufacturers and numerous small-engine platforms.

• Motorbikes: CR, CRF, KX, KLX, YZ, RM, RMZ, KTM models and more.
• ATVs and buggies: Polaris, Suzuki CVK-equipped ATVs, V-Twin CVKR applications, and GY6-based scooters/buggies.
• Specific fits: CVK20, FCR-MX, PD22, PE20/26/28/30, PJ34/36/38, PWM34/36/38, PWK28/33/35/36/38/39 configurations.

How will this kit help during rebuilding or performance tuning?

Having multiple jet sizes on hand eliminates downtime while trialing different fuel mixtures after changes like intake, exhaust, or elevation. It makes it easier to correct lean or rich conditions across throttle ranges, improving throttle response and drivability without repeated parts orders.

• Quickly test richer or leaner mains and pilots for midrange power and idle stability.
• Simplifies rejetting after airbox, filter, or exhaust modifications.
• Reduces trips to the parts store by supplying common sizes in one kit.

Which installation tips should I follow to avoid problems?

Work with a clean workspace and the correct screwdriver for hex or slotted jets to prevent rounding or damage. Make small incremental changes—one or two jet sizes at a time—then ride and observe spark plug color, throttle response, and idle to guide further adjustments.

• Use a magnetized tray to keep tiny jets organized while disassembling the carb.
• Change one jet at a time and record the results for repeatability.
• Check float height and air filter condition before finalizing jetting changes.

Who is this kit for? The YGQ 43Pcs Carburetor Jet Kit is aimed at home mechanics, racers, tuners and powersports enthusiasts who service Keihin/Nibbi-style carburetors. It’s useful for anyone rebuilding carbs or adapting engine breathing—especially riders who travel between elevations or modify intake/exhaust systems and want a reliable set of jetting options without multiple orders.