having more open exhaust causes losing power, not gaining power, unless you enrich the fuel. people confuse 'louder' for 'stronger'. the ecu in the bike has been programmed for the oem silencer with the intent to give it as much power as possible.
my Versys 1000 with Akra slip on, lost 10km top speed (220km/h vs 230km/h) in spite of the Akra claims that it gains HP. it is their marketing bs. especially, you compromise the lower end torque. still, the loss is not so much, and one get much lighter silencer, and one that is more pleasing aesthetically; plus better sound.
the Triumph company at least offer the ecu map change for Tiger 800 with their optional open silencer.
as you love riding, you need to love you bike
Last edited by Kris; 05-31-2019 at 02:56 AM.