silencieux d'origine

bonjour, y'a t'il quelqu'un qui a déja modifier son silencieux d'origine ?
si oui combien de chevaux supplementaires ?
merci.

hello, anybody has modified his silencer of origin ?
if yes, how many much power ?
thanks.

(I becomme good in english ).

If you mean modifying the stock muffler, I wouldn't bother with that.

Everybody seems to be using the FMF Q4 muffler around here, and a lot of those riders also use the FMF Powerbomb header along with it.
As long as you install one of the electronic fuel injection programmers AS WELL, along with disabling the airbox inlet flapper AS WELL, you'll get a very nice increase in power and throttle response, oui, oui.

I also recommend lowering the final drive ratio quite a bit, but everyone seems to have a different opinion on that one. :)

ok merci ;
faut'il modifier les reglages injection quand on change le silencieus et le collecteur car cela entraine la suppression de la valve exup ?

You want the fuel injection programmer so the bike will run better than it would without one.

le mélange air-essence est pauvre d'origine, avec un silenciaux et un collecteur modifié c'est encore plus pauvre... alors oui ça prend un programmeur d'injection.

combien de chevaux en plus ?

conbien de kw en plus avec fmf mufler + electronoc fuel injection ?
merci.

check the results here:
dyno info