How to Quiet Stock Exhaust

[Suzukas]

Hi, 

I did a search and came up empty handed, does anyone have a solution for quieting my stock exhaust? I have a street legal Suzuki rmz250 from 2007. 

It have a FMF power bomb header and stock muffler. Id ideally like to lower the Db and keep the HP power. 

Thanks, 

 

Edited February 8, 2017 by Suzukas
revision

[notoriousE-R-I-C]

Sweet howd you get a track use only bike street legal? Its stamped on the bike so Id think itd be hard to change that. Its federal. Not state. But Ive seen it done...IVE done it! I just wanna know how you did it?
Sacrificing DB is going to decrease HP. Theres small ways around it Im sure. But still it has its affects.
I say repack it and get a spark arrestor.
Ask guys that ride woods mostly. Theyll know better. Im in the desert mostly.