Why different exhausts for different bikes

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aka.Goliath

Race Dog
Joined
Feb 29, 2012
Messages
2,117
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Location
Johannesburg
Bike
KTM 690 Adventure
Is there really any reason why you can't use an exhaust from a single cylinder on a twin cylinder or visa versa? What are the technical differences - if there are any - that makes one not work on another bike.
 
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