Harley Davidson Exhaust Popping

In fact one should expect a well-tuned high performance engine to pop and crackle when the throttle is closed at high rpm.

Harley davidson exhaust popping. I kind of like the sound on my bike even though it is muffled a bit. When any unburnt fuel exits the cylinder like on decel the air that can leak into the system will cause the mixture in the system to ignite causing a pop. A fuel pak may help to rid of some of the popping but I would first check for any leaks in the system usually the main culprit.

Internally the louvered core provides the bark and back pressure needed to make your bike run as well as possible. The HD ECM does not shut off fuel on decel so there is some uncombusted fuel that hits the hot baffles in the muffler and burns off causing the popping. It is also necessary that the exhaust system have rather open mufflers.

The popping is caused by unspent gas building up in the cylinder or within the exhaust header on decel and then finally the heat or spark will set it off. Depending on the cam you run also has a effect on popping when decelerating. Timing even slightly retarded will also greatly contribute to this popping.

Popping on a Harley is not uncommon and many riders rather enjoy the light popping. Expert Gear Advice From Riders. When your exhaust valve opens after cylinder fires there is a flame present at exhaust valve.

When the Harley is backfiring with the stock exhaust system still intact it might signal the exhaust pipe weakening or the muffler is malfunctioning. Ad Fast Free Shipping on Orders Over 40. Loosen and retighten the nuts holding it together at the cylinder head exhaust port.

The engine backfire on deceleration is also caused by the too lean airfuel ratio - A lot of people think that the backfirepopping in the exhaust is caused by too rich mixture but its actually the other way round. For older Magnetti Marelli fuel injected bikes adjusting the fuel table to remove fuel can help reduce popping. Just pull it off check the gasketif its worn at all replace but most often its fine.