TRX250R.ORG
Workshop => Carburetor, Intake, and Exhaust => Topic started by: chrisr on September 05, 2013, 10:56:38 AM
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Decided I'm going to make the switch to straight 110 octane race fuel. I had been using 108 octane "pump race fuel". I want to get away from using anything from the pump and start buying the 5gal cans most fuel companies offer. I'm looking for a little guidance as to what fuel I need to use......oxygenated or non-oxygenated? Also looking for a baseline to start jetting from. The engine has no port work, a cool head using a 20cc dome, Boyesen power reeds, stock 34mm Keihin carb and FMF pipe. I'm in South Carolina with a elevation of 136ft above sea level. I'm new to the Keihin carbs and their jetting numbers and looking for a starting point.
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Do not use oxygenated fuel for several reasons. To many problems & even as much time to explain the reasons.
The main thing to think about on the gas used, how high the engine is building compression to & what jet sizes you'll need to keep that piston cool.
List the engines compression when cold & then when hot.
Neil