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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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[QUOTE="Big Bore Stroker, post: 1232281, member: 70619"] Deceleration knock is the same as detonation it's can accur under deceleration and acceleration. Knock occurs because the pressure and temperature in the cylinder are high enough when combustion is occurring that the unburned fuel/air mixture spontaneously ignites. Some things that can cause this are combustin temps, ignition timing, fuel grade, engine load , compression etc. If the bikes runs great everywhere else it could be just some jetting issues that would need to be addressed. Could start by going one size richer on the pilot jet or maybe the needle, but we don't what your current jetting spec are. What if any engine mods (porting,head work etc)? Have you changed any jets in the carb? What pipe set up? Are you over reving the engine while coasting downhill? Try to coast in a higher gear and then down shift after in the corner. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
deceleration knock with 2 strokes
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