O-ring mod(keihin FCR carb)CRF150rb
My CRF 150rb has a lot of low end bog when I would hammer down on the throttle out of corners or on the face of a jump. This mod helped it go away without having to re-jet the bike. I would recommend for all who ride four stroke race bikes

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![FCR Carb Accelerator Pump Tuning [EXPLAINED]](https://i.ytimg.com/vi/p7Tmdl_owSQ/hqdefault.jpg?sqp=-oaymwE9CNACELwBSFryq4qpAy8IARUAAAAAGAElAADIQj0AgKJDeAHwAQH4Af4JgALQBYoCDAgAEAEYZSBbKFAwDw==&rs=AOn4CLDCnJnP5SPArKkZs5sUWYw4MWlwGA)
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FCR Carb Accelerator Pump Tuning [EXPLAINED]

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