YGQ Carburetor Jet Kit 43pcs for Keihin/Nibbi-style carbs — Main & Pilot Jets for Motorcycles, ATVs (Round & Hex)

The YGQ 43Pcs Carburetor Jet Kit is a comprehensive selection of main and pilot jets designed to tune and replace Keihin/Nibbi-style carburetor jets across many motorcycles, dirt bikes, ATVs and powersports engines.

Whether you’re rejetting after airbox, exhaust or altitude changes, or simply replacing clogged jets, this kit supplies a wide range of sizes so you can dial in fuel delivery. The set covers both small round and hex main jets plus pilot slow jets, and is compatible with an extensive list of Keihin, PWK, FCR and CVK family carburetors used on Honda, Yamaha, Kawasaki, Suzuki, KTM and many other models.

Which jet sizes are included and how do they cover tuning needs?

This kit includes multiple main jet styles and a progression of pilot jets so you can fine-tune low- and high-speed fueling. Sizes span conservative to rich options to match changes in intake, exhaust and riding altitude.

• 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

What carburetor types and vehicle models does this kit fit?

The set is engineered for Keihin-style carbs and many compatible models across brands. Check your carburetor type (e.g., CVK, PWK, FCR, PD/PE series) and bore size to confirm fit; the kit supports both round- and hex-style jet seats.

• Fits many Honda CR, CRF, TRX series and other models listed (CR60, CR80, CRF150/230/250/350/450).
• Compatible with Yamaha YZ85/YZ250/YZ450 and similar models, plus Kawasaki KX/KLX series and KX with Keihin PWK carbs.
• Works for KTM, Suzuki, Husqvarna, Polaris ATVs and a variety of scooters, buggies and GY6-based vehicles noted in the compatibility list.

How do I use the kit to rejet or troubleshoot fueling issues?

Start by identifying whether the bike is running lean or rich and test progressively through jet sizes. Replace only one jet at a time, test ride under the load and conditions you normally use, and note changes so you can return to the best-performing size.

• For high-altitude or intake/exhaust mods, try one step larger main jet and re-evaluate.
• If you experience bogging at low throttle, switch pilot jets incrementally to find smoother throttle response.
• Keep the old jets organized by original size and record adjustments to avoid confusion.

Are there any fitment tips or limitations I should know?

Confirm your carburetor model and jet seat style (slotted/hex/round) before installing — some jets are slotted for FCR or specific carb types. Avoid forcing mismatched jets into a seat; use the correct head style to prevent damage.

• Compatible with carb bore sizes such as PD22, PE20–30, PJ34–38, PWM/PWK28–39 and select FCR/PWK quad vent types.
• Includes main air jet variants suitable for FCR-style setups where applicable.
• Not a guaranteed direct-fit for every model; a cross-check with your carburetor part numbers is recommended.

Who is this for: This YGQ jet kit is aimed at riders, mechanics and DIY tuners who work on motorcycles, dirt bikes, ATVs, scooters and small-engine buggies that use Keihin-style carburetors. It’s useful for anyone needing a broad range of replacement jets for rejetting after modifications, solving clogged jet problems, or building a tuning bench for multiple bikes and carb types.