Harley Davidson Exhaust Popping

All exhaust popping or backfiring on a Harley-Davidson motorcycle is caused by fuel combustion in the exhaust manifold or the header pipes.

Harley davidson exhaust popping. Popping on a Harley is not uncommon and many riders rather enjoy the light popping. 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.

Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. When your exhaust valve opens after cylinder fires there is a flame present at exhaust valve. Exhaust leaks can cause decel pop make sure the exhaust is sealed completely at the motor and at any other connections.

Check the slip-on connections and also where the header joins the cylinder. Ad Fast Free Shipping on Orders Over 40. Timing even slightly retarded will also greatly contribute to this popping.

The popping is a result of the airfuel mixture becoming very lean when the throttle is closed and the engine is rotating well above idle speed. 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. When the Harley is backfiring with the stock exhaust system still intact it might signal the exhaust pipe weakening or the muffler is malfunctioning.

Depending on the cam you run also has a effect on popping when decelerating. Vance Hines Titan 450 Slip On Harley Davidson Exhaust. Loosen and retighten the nuts holding it together at the cylinder head exhaust port.

Expert Gear Advice From Riders. Exhaust leaks can cause decel pop make sure the exhaust is sealed completely at the motor and at any other connections. Just pull it off check the gasketif its worn at all replace but most often its fine.