Bonneville America Forums Forums Technical Forums Exhaust Pop at desceleration

You should remap if the pipes are freer flowing than stock. Otherwise you risk running too lean/hot. The bikes are lean out of the factory. You will also likely get a performance improve.

The pop in an EFI is intentional as the AI explodes unburnt fuel in the headers. No damage done. Not to be confused with get a backfire through the airbox which can shatter an airbox and probably do other damage as well.