Question about Yamaha WR 450 F Motorcycles
Your motorcycle is starving for fuel. The choke blocks off air and forces the fuel air mix to be richer than normal. Typically used for cold starts then when you take the choke off your engine is allowed to **** more air, even though the mix VOLUME is the same, the mixture is leaned out to accomadate your now warmed up engine for optimum performance. If you have a blockage, typically in a fuel filter, or a jet, or from the carb being dirty or plaqued, the engine sucks too much air because it can't get enough fuel, (mixture too lean), therefore you have to use the choke when you normally would not need to in order to over compensate. The fix is a through cleaning of the fuel system. You can start by changing the in line filter. If that does not do the trick it will be necessary to remove the carb, take apart and soak in carb cleaner, then blow out with compressed air. Particularily the jets. Be careful not to blow out a needle seat. You may want to remove those before blowing. Good Luck. This should fix you up! I hope you have found it very helpful!
Posted on Nov 16, 2009
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Posted on Jan 02, 2017
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