Harley Davidson Exhaust Popping

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.

Harley davidson exhaust popping. 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. 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.

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. Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. Vance Hines Titan 450 Slip On Harley Davidson Exhaust.

For older Magnetti Marelli fuel injected bikes adjusting the fuel table to remove fuel can help reduce 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. It is also necessary that the exhaust system have rather open mufflers.

If your spitting popping and having trouble keeping the engine turning at idle you most likely have a slip of the gasket on your t-pipe that connects the carb to the engine. 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. Ever since Cobra introduced the 909 slip ons they have been getting requests for a version that aligns perfectly with the bags.

I kind of like the sound on my bike even though it is muffled a bit. All exhaust popping or backfiring on a Harley-Davidson motorcycle is caused by fuel combustion in the exhaust manifold or the header pipes. Expert Gear Advice From Riders.

It is nothing to worry about. In fact one should expect a well-tuned high performance engine to pop and crackle when the throttle is closed at high rpm. Internally the louvered core provides the bark and back pressure needed to make your bike run as well as possible.