Keihin 4mm Main Jet for PB, PAB & CVK Carburetors

High-precision 4mm machined brass main jets in the Keihin "Small Round" (99101-116) style. The essential tuning component for optimizing air-fuel ratio after installing a big-bore kit, exhaust, or high-flow air filter. Available in sizes #75 through #130 to cover a wide range of tuning needs.

Key Features

• Keihin Small Round style (99101-116) — M4x0.70 thread pitch
• High-grade machined brass for precise metering and durability
• Available in 15 sizes: #75, #80, #85, #90, #95, #98, #100, #102, #105, #110, #115, #120, #125, #128, #130
• Fits OEM and aftermarket Keihin PB, PAB, NCV, and CVK carburetors (17–26mm)
• Not compatible with Keihin "Large Round" (99101-393) or "Hex" (99101-357) styles

Specifications

• Jet Style: Keihin Small Round (99101-116)
• Thread Pitch: M4 x 0.70mm
• Dimensions: 7mm total length x 5mm head diameter
• Material: High-grade machined brass

Compatibility

Tuning tip: Always start with a larger jet than you think you need and jet down. Running too lean can cause overheating and permanent engine damage. See our Jetting Instructions for a full guide.

California Prop 65 Warning: www.p65warnings.ca.gov

• Keihin Small Round style (99101-116) — M4x0.70 thread
• High-grade machined brass for precise metering
• Available in 15 sizes: #75 through #130
• Fits OEM and aftermarket Keihin PB, PAB, NCV, CVK carburetors
• Not compatible with Large Round (99101-393) or Hex (99101-357) styles

Jet Style: Keihin Small Round (99101-116) | Thread: M4 x 0.70mm | Dimensions: 7mm length x 5mm head | Material: Machined Brass | Sizes: #75, #80, #85, #90, #95, #98, #100, #102, #105, #110, #115, #120, #125, #128, #130

Genuine Buddy 50 (stock #74) | Genuine Buddy 125/150 (stock #90) | Genuine RoughHouse 50 | GY6/139QMB 50cc & 150cc CVK carbs | Keihin PB, PAB, NCV, CVK 17-26mm | Select Honda, Yamaha, SYM 4-stroke with Keihin CVK