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.

Harley davidson exhaust popping. Ever since Cobra introduced the 909 slip ons they have been getting requests for a version that aligns perfectly with the bags. 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 your exhaust valve opens after cylinder fires there is a flame present at exhaust valve.

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. Depending on the cam you run also has a effect on popping when decelerating. Generally speaking it may be caused by a an exhaust manifold leak.

All exhaust popping or backfiring on a Harley-Davidson motorcycle is caused by fuel combustion in the exhaust manifold or the header pipes. When the Harley is backfiring with the stock exhaust system still intact it might signal the exhaust pipe weakening or the muffler is malfunctioning. 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.

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. Loosen and retighten the nuts holding it together at the cylinder head exhaust port.

Exhaust leaks can cause decel pop make sure the exhaust is sealed completely at the motor and at any other connections. 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. It is nothing to worry about.

Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. Expert Gear Advice From Riders. Timing even slightly retarded will also greatly contribute to this popping.