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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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[QUOTE="76GMC1500, post: 1232320, member: 73139"] Pinging is two flame fronts colliding and is caused by hot spots in the combustion chamber. A seperate flame front starts elsewhere in the combustion chamber and collides with the flame front from the spark plug making a high pitched "ping" noise. Your dirt bike is so loud, you'd likely have a hard time hearing any pinging. Detonation is the explosive ignition of fuel/air under very high pressures/temperatures. Detonation's sound is best described as shaking a can full of rocks and is definately audible over the bike if it becomes severe. Pinging can lead to detonation because the 2nd flame front can cause a sharp rise in cylinder pressure similar to running too much spark advance. But, the two are not the same. None of these have anything to do with fuel burning in the pipe. If you want to hear detonation, try running a hill climb with your fuel petcock off. Your bike will run into severe detonation by the time you hit 3rd gear. If you're lucky, you'll kill the motor before you melt the piston. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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