...I just made the Justy more annoying than it was to begin with.
The muffler was in tatters and one of the hangers broke off, so I had a shop cut it off and weld on a piece of pipe.
It's actually quieter at idle - mostly because the rattling, squeaking and banging are gone - but once it gets up in the revs (I have no idea what point - no tach) there's this big BRAAAP.
Hee hee.
Oh, and it backfires. Little Justy 'pops.'