Harley Davidson Exhaust Popping

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.

Harley davidson exhaust popping. Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. 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. I kind of like the sound on my bike even though it is muffled a bit.

Ever since Cobra introduced the 909 slip ons they have been getting requests for a version that aligns perfectly with the bags. Loosen and retighten the nuts holding it together at the cylinder head exhaust port. Popping is basically caused by a leak in the exhaust system possibly at the head pipe or at a joint in the system that draws in air.

Exhaust leaks can cause decel pop make sure the exhaust is sealed completely at the motor and at any other connections. Unknown June 4 2017 at 703 AM. Timing even slightly retarded will also greatly contribute to this popping.

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. Agreed you should check the muffler to header joint as well as the exhaust flange nut but even if tight you will still get the decel pop.

During backfires unburnt fuel goes out through the exhaust valve on deceleration. Popping on a Harley is not uncommon and many riders rather enjoy the light popping. Ad Fast Free Shipping on Orders Over 40.

It is also necessary that the exhaust system have rather open mufflers. Ad Fast Free Shipping on Orders Over 40. Depending on the cam you run also has a effect on popping when decelerating.