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Does exhaust back pressure affect tuning?
When one buys a full exhaust system for a motorcycle, this is typically paired with a new air/fuel map of some sort.
Why?
Is the new mapping there only to take advantage of the new open exhaust, and increase performance?
Or is the map there because it is required to keep the engine running well with the reduced back pressure? To put it another way, could I put straight pipes on a modern FI bike, leave the mapping stock, and drive it without causing long term harm?
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