The 380 runs very well and smooth. I thought it was a little noisy and lacked a bit of low down torque. Found the problem, no baffles in the exhaust. Well seeing as baffles are just a bit of pipe with holes I thought they would be cheap. Was I wrong. A set of new ones runs over $350 plus freight. They have to come from overseas so I imagine at least $400.
As I said they are very straightforward things so I'm trying to get the specs and fabricate a set.