KEHIN ASST KPJK01 Pilot Jet Kit for Keihin N424-21 – EBC Carburetor Pilot Jets

Technical specifications

• Units: Kit
• Product Name: Pilot Jet
• Color/Finish: Clear | Gold
• Base Color: Gold
• Material: Brass
• Model: Keihin N424-21
• Jet Size: 35–80
• Length: 28.00 mm (1.10")
• Length Imperial: 1.10"
• Length Metric: 28.00 mm
• Head Diameter: 5.00 mm (0.20")

Benefits and compatibility

Engineered for precise fuel metering, this pilot jet kit from EBC improves idle stability, cold-start behavior and low‑to‑mid throttle response on Keihin N424-21 carburetors. The set covers a broad range (35–80) to support tuning across different 2-stroke configurations, including Yamaha and other brands that use Keihin pilot circuits. Expect cleaner transitions, steadier idle and more consistent performance when dialing in air-fuel mixtures for tuning sessions and track days.

Materials and craftsmanship

• Brass construction for durable, reliable metering
• Gold base with clear finish to resist wear and aid identification
• Machined to tight tolerances for consistent flow across each size

Installation tips

• Verify compatibility with Keihin N424-21 carburetors before installation
• Begin tuning with mid-range sizes and adjust in small steps to refine idle and mix
• Use proper tools to avoid damage to jets and floats
• Check for leaks and confirm correct float level after fitting the kit

Why choose AEB Development

At AEB Development, we believe in parts that make a real difference on the bench and on the road. This pilot jet kit is built for repeatable performance, giving you tangible feedback from the throttle and a clearer sense of how each modification affects engine behavior. It’s the kind of component you trust when you’re chasing consistency, not just numbers.

AEB Development — passion you can feel, parts you can trust, performance you can ride.