Keihin fcr-mx39 carb - for 350-500cc bikes and quads, Keihin carbs, ATV, quad bike, farm bike, parts, accessories | ATV Guide

Keihin FCR-MX39 Carb - for 350-500cc bikes and quads

The ultimate for off-road performance.

Keihin has developed an FCR carburetor designed for the specialized needs of the off-road racer.

The FCR-MX carb has many new features to take motocross and ATV performance to the next level.

These are some of the unique features of the Keihin FCR-MX for off-road applications:

• Over-flow drain joint and tube
• Throttle cable enclosure
• High capacity float chamber
• Float chamber baffle for rough terrain
• Quad vents

Standard jetting:

• Main jet: #160
• Main Air Jet: #200
• Slow Jet: #45
• Slow Air Jet: #100
• Jet Needle: OC-EMR
• Throttle Viv. Cutaway: 1.5
• Needle Valve Seat: 3.8
• Float Height: 9mm

For 350cc-500cc bikes and quads