Video containing original stainless steel exhaust (2005 model), Giannelli full system exhaust with dB-killer and without it. Also short dynorun to check air/fuel ratio. 44HP on rear wheel with only this modification, if intake is modified you should expect more result. I did this for the sound, not to increase the horsepower. It's cheaper to buy a bigger bike than to modify this one.
![](https://i.ytimg.com/vi/ZoH897aFM6M/maxresdefault.jpg)