I have not tried it but makes sense that it would work great. The stock mufflers are far to restrictive. I ran a chinagirl with out the baffle for months (it fell out an' got it self run-over) on one of the longest running engines I have owned.
I have always thought an over-sized muffler like a forklift has, would be the way to go. Or a radiator hose as an expansion chamber. Makes a really cool "thump-thump" sound.