that's actually pretty good news for you that it was just something in the exhaust loose. Engine sounds good without it on. As Tom indicates, if whatever's broken free in the muffler blocks it up, it can cause major performance issues. additionally, the exhaust side of the valve looks like your running really rich ...which of course, having a plugged muffler would cause ...
Last edited by x-bird; 10-10-2015 at 08:49 AM.
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