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Keihin FCR tuning manual Version 3.3. By Patrick Burns. Many thanks to Marc Salvisberg, founder of Factory Pro Tuning, for teaching me the finer points of using dynamometers and tuning carburetor equipped engines.
Exploded view diagram for KEIHIN FCR, FCR-MX, PWK, PWK-S, PWM, PJ, PE.
12 lut 2022 · This url below links to my free spreadsheet for decoding Keihin needles and finding another needle to buy. It also tells how to decide on changes of straight section length, diameter, and taper angle.
1 kwi 2014 · If you switch the carb on an 04 trx450r to a FCR carb do you have to change the jet sizes?
Keihin FCR tuning manual. Free tuning manual by Patrick Burns. It covers all the important topics in tuning your FCR racing carbs: synchronizing; fuel screw; slow fuel jet; slow air jet; slow air screw; main fuel jet; main air jet; needle codes; needle selection; etc.
10 mar 2013 · if your HEADPIPE GLOWS at idle, it will be either the idle fuel screw too lean...or the pilot too lean... or a combination of both.... 48~50 pilot is a common sweet spot for pilots jets...and 1.5 to 2.5 turns out from closed on the idle fuel screw is a common sweet spot.
9 gru 2016 · Keihin’s FCR carburetors come fitted on a wide variety of dirt and dual-sport bikes, not just those from KTM. Various engines may respond differently to the modifications that follow, so it’s best to check with your own local expert regarding your particular machine.