YGQ Carburetor Jet Kit for Mikuni Main & Pilot Jets — 42 Pcs (N100.604, VM28/486, VM4/042, VM22/210)

The YGQ Carburetor Jet Kit for Mikuni Main & Pilot Jets offers a versatile tuning toolkit designed for riders and technicians who value precise, adaptable fuel metering. This 42-piece set provides a broad spectrum of jet sizes to cover a wide range of Mikuni carburetor configurations and riding conditions, helping you explore tuning options with confidence.

What’s included and what it covers

• Large round main jet sizes: 90, 100, 110, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180, 190
• Large hex main jet sizes: 130, 140, 150, 160, 170, 180, 200, 220, 240, 260, 280
• TM pilot slow sizes: 17.5, 20, 25, 30, 35, 40
• VM pilot slow jet sizes: 25, 30, 35, 40, 45, 50, 55, 60

Firm compatibility and use cases

Designed to fit a broad family of Mikuni carburetors and related needle jet series, this kit supports a wide range of two-stroke and four-stroke engines used on street, ATV, and off-road bikes. It accommodates models such as HS40 Flat Slide with Accelerator Pump, HSR42/45/48, RS34/36/38/40 Flat Slide Rack, TM33-8012 / TM36-68 / TM40-6, VM16-519 Round Slide with Clamp On, VM29 and VM33 Smoothbore Racks, and more. The included needle jet references (171, 188, 196 with Large Round; 568, 640, 723) help you locate compatible options for future tweaks.

The kit is suitable for Mikuni carbs commonly found on brands like Honda, Suzuki, Kawasaki, Yamaha, and Polaris, providing flexibility to owners with multiple setups or evolving projects.

Practical applications and benefits

• Fine-tuned idle and throttle response across a range of RPMs and riding styles
• Potential improvements in fuel metering under varying weather and elevation conditions
• Versatile coverage for multiple carburetor models within a single kit

Real-world expectations

Users often notice smoother starts, steadier idling, and more predictable mid-range behavior when experimenting with different jet sizes. The broad jet range supports scenarios from casual street riding to more aggressive off-road setups. Results vary with engine, fuel, and climate, but the kit provides ample options to tune your Mikuni carburetors for your specific context.