have an 05 crf 450 with stock silencer.. i usually put a new silencer on after awhile but i really happy with the bike as a whole that i haven't yet, but i have had the bike since last december and i try to ride once a week.. anyway my question is do you replace the stock silencer packing??? if so do you just drill out the rivits?? and what kind of packing do you suggest?

The Silent Sport packing from Race Tools works good. It's available from the TT store.

To change the packing you'll have to drill out the rivets on the end of the can where it attaches to the mid pipe.

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