Need to quiten the thing down a bit

Gday guys, going to a bike park that test all bikes and they must be below 112db, I measured my 2002 KX250 today and its about 115db.  I have recently repacked the silencer with too much force so I am pretty sure the packing is not the issue.

 

Does anyone know a simple way to quieten it down?  even if its only for the test 

 

 

The packing shouldn't be jammed in there.  If it's properly repacked and still doesn't pass you need a longer silencer, db dawg, etc.

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