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Dirt Bike Brands - Other
Crf 450 running bad in neutral on the stand
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[QUOTE="MXN4FUN, post: 742081, member: 15981"] Lets see if I can clear some things up here. With no load on the motor jetting would be rich especially when you are blipping the throttle. Accelerator pump is squirting gas into the intake for use in a loaded engine. This escapes as some unburned fuel or small flames out the exhaust. The missing you here on the stand is because the bike is in neutral and the engine has no load. The ignition retards to the point it revs a certain RPM(not redline) I believe this is for the FIM mandated sound tests in Europe. The best way to think of a loaded engine is to ride in sand. Sand requires richer jetting because the load is higher and more constant. Where as hard pack jetting can be leaner because of less friction trying to stop the rear tire. The red header section comes from idling not revving. Revving increases velocity inside the pipe cooling it. To you guys revving to the moon on the stand, quit it. It serves no purpose, except to shake dried mud off. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Crf 450 running bad in neutral on the stand
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