Re: exhaust mod
I'm not getting much leakage. I will probably try sealing it with something. High temp silicone sounds like a great idea. I want to retain the ability of disassembling it and silicon would make that possible. Silicon will also give it some added strength. The compression fitting is pretty solid, i don't think it will fail under vibration.
I was originally going to extend the EMT to the tire as you suggested but opted to leave it short. My reasons being, i did not want to restrict the exhaust, any moisture or oil will lay flat in the exhaust system, the exhaust is not directed straight down and instead towards the back spokes, and its a ***** to bend EMT. You could increase the EMT from1/2 inch to 3/4 inch and reduce the back pressure if you could find a reduced compression fitting.