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I guess my engine's SHOT then cause I don't think there's anything between my exhaust valves and the atmosphere.

My ears sure don't think there is!

(That's sarcasm btw, for those of you not sharp enough to catch it)
 
Well.... I have noticed .... I have a Viking header flowing into a SuperTrapp muffler. When I remove the end cap of the muffler the bike feels like it loses some torque/horsepower. Install if back on and it's back to peppy bike again. This is the end cap I'm speaking about.

END CAP
 
A retune with the end cap off would make more power, you feel the loss because it's scavenging differently enough to change the mixture in the chamber.
 
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