![]() Such an adjustment will result in a sluggish response off idle. This is especially important on Keihin PJ series carbs in that the idle adjust knob ( #4 in illus.) cannot be completely closed. Zero throttle operation - (idle circuit) idle screw: depending on your type of riding adjust the minimum idle speed to desired rpm making sure the engine is up to operating temperature If you do not desire any idle make sure you turn in the adjusting screw just enough so the engine will not idle. Keihin FCR Gaskets at Middle of Carburetor.jpg. Keihin PWK and FCR Instructions, Exploded Views, and Parts -Picture Gallery. The carburetor pictured in the exploded view uses. This is the base guideline about tuning your Keihin. On FCR carbs the main jet, slow jet, jet needle, air adjustment, slow jet air adjustment and gas valve are different and located elsewhere. The guidelines are the same for both 2 and 4 stroke. This section features the PWK exploded views just to let you understand where the tuning components are located. Don't do it yourself if you don't feel confident but let it to a professional mechanic. Certain parameters may vary due to air pressure and temperature, altitude, umidity.īe carefoul when jetting, a bad jetting can produce huge engine failures. Tips This is the base guideline about tuning your Keihin. ![]()
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