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XR650R Xr650r exhaust quiet but perform

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Got new laws starting here about noise. My xr has a xrs only supertrapp disk type exhaust on it. I have a gutted stock exhaust buddy gave me, but no stock tip. Like the way bike performs just fine, air box, jetted 68s 171 runs great street or dirt, probably, probably my favorite bike ever.

Any ideas , cheap ideas to get noise down but not sacrifice too much performance? Stock pipe label will b a big help out here. I've seen down turn tips, my sticker someone cored out about 2 inches but never put in back pipe, down turn. Trying to get under 95 db at speed or less. Laws here say 86 db but may have some wiggle room.

Thanks

Chuckster

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 Wow 86db, wonder what the Harley guys are saying? Maybe the fully stock non-drilled muffler would pass that though. I'd take as many plates off the Supertrapp as  you can stand and have an insert ready if ticketed. On my 600r I made a steel tube insert with small ID washers welded on each end to quiet it down, lost some power for sure. 

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In Cali they have laws on off road "vehicles" as well as road "vehicles"

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I just looked it up , it's 80 db and an aftermarket exhaust manufactured after 2013 must have an EPA noise emissions label. 

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