Main jet for Keihin 2-stroke carburetors. Genuine Keihin, high quality part. Keihin’part # 99101-357. This fits: Keihin FCR racing carburetors Keihin FCR single carburetors Keihin FCR MX carburetors Keihin CR special carburetors Keihin PE / PJ / PWK / PWM carburetors etc. Complete as pictured
