YGQ 43Pcs Carburetor Jet Kit for Keihin Nibbi carb

YGQ 43-piece carburetor jet kit supplies a full range of main and pilot jets sized to tune Keihin and Nibbi-style carbs on motorcycles, ATVs and small engines.

This kit gathers commonly used round and hex main jets plus pilot (slow) jets so you can adjust fuel metering for altitude, aftermarket exhausts, air filters or engine modifications. The assortment covers many Keihin PWK, CVK, FCR and compatible carburetor families found on Honda, Yamaha, Kawasaki, KTM, Suzuki, Husqvarna and a wide range of powersports machines. All parts are organized to make swapping jets fast and to help you find the correct size when dialing in mixture and throttle response.

Which jets are included and what sizes do they cover?

The kit contains 43 jets split between small round main jets, hex-head main jets and pilot slow jets, spanning low to high flow numbers commonly required for tuning. Sizes are clearly labeled so you can compare stock jets to find the next incremental step for richer or leaner mixtures.

• 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.

How does this kit fit different carburetor models and vehicles?

These jets are intended for Keihin-style and many compatible Nibbi carbs across motorcycles, dirt bikes, scooters, ATVs and select UTVs. The set references common carb sizes and models so you can match jet diameters to Keihin CVK, PWK, FCR and other compatible families.

• Compatible brands include Honda, Yamaha, Kawasaki, KTM, Beta, Polaris, Suzuki and Husqvarna.
• Works with carb models such as CV, CVK, PWK, FCR-MX, PD/PE, PWM and several GY6 variants.
• Listed fitments: CRF, KX, YZ, RM, KLX, TRX, KTM models and many ATV/UTV carburetors.
• Includes main air jet for select FCR carbs and jets that suit CVK20, PWK28–39, PD20–30 and PWM34–38 sizes.

When should I change jets and what results should I expect?

You should change jets whenever the engine shows lean or rich symptoms after hardware or environment changes—like a freer-flowing exhaust, high-compression head, intake modifications, or riding at different elevations. Swapping to a slightly larger main jet generally enriches the mixture under wide-open throttle; a smaller pilot jet alters low-throttle smoothness and idle quality.

• Use larger main jets for richer full-throttle performance after intake/exhaust upgrades.
• Adjust pilot jets to fix hesitation, popping, or unstable idle at low throttle.
• Carry a couple of incremental sizes to test and revert if performance worsens.
• Label stock jets before removal to ensure accurate comparisons and easy reinstallation.

What comes in the kit and how is it packaged for workshop use?

The set arrives with 43 individual jets, sorted by size so you can quickly pick the required diameter during tuning. Packaging is compact for garage storage and designed to keep jets organized and protected from loss or damage.

• 43 jets total across three categories: round mains, hex mains, and pilot jets.
• Each jet is marked for easy identification; suitable for mechanics and DIY tuners.
• Small, durable carry case or foam insert helps keep pieces in order during use.

Who is this for: This YGQ jet kit is aimed at mechanics, racers and DIY riders who tune Keihin/Nibbi-style carburetors on dirt bikes, ATVs, scooters and small off-road machines. It’s useful for anyone needing a broad selection of jet sizes to adapt fuel delivery after performance modifications, altitude changes or to troubleshoot fueling issues without waiting for individual parts.