ralfyguy
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I bought mine with the gutted stock muffler some three years and 12,000 miles ago. It still runs like a champ. It did run like crap when i first got it, but reducing the white spacer, adjusting the mixture screw and putting a 150 main jet took care of that. The valves run nice and quiet and I only had to adjust them the first time, and the 2nd and 3rd year checkup showed no change. It gets ridden strong after warming up the oil and it sees lots of superslab high speed runs. Thing is when you gut a stock muffler is pretty much just taking out the sound control, as when you look up inside, deep in there is still two chambers, separated by plates that IMHO are the actual part for controlling the back pressure. It is not a straight through open scenario if you just take the baffle out. The Hartman Mod proves that. So in this case, I don't think the removal of the stock baffle is really critical to the health of the engine. I have no problems at all.
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