I just got my 77 puch maxi running, the exhaust seemed very restricted. After removing the stuborn baffle, I found it was very dirty/clogged. I soaked it in overnight, then ran it through a steam cleaner. I got it almost back to original condition and exposed some holes that were completely blocked. I have not got it back together yet to compare power. My question is: has anyone modified it by adding more holes, etc. I saw a reference to an old post where someone had done just that, but couldn't find any details. It seems even with it clean, it could use a little more "breathing room"