old.indian wrote on 06/08/16 at 12:13:12:#1) Park City is at roughly 7,000+ feet and the bike is set at the factory to run lean at sea level.
#2) By changing the muffler you make it even leaner.
Best thing to do is to re-jet the carb and install a less restrictive air cleaner..
When you're higher in altitude, less oxygen goes in with the same amount of gas. So a lean setting at sea level maybe perfect at 7,000 feet. At least that's what the guys in Denver claim.
So does the Dyna have the baffle knocked out?
A stock Dyna may not need any adjustment.
Set your jets so the bike runs right.
If the pipe turns purple, it might be hotter than usual, gold is typical.
if you want, get an infrared temperature gage and measure the temp.
We can start a thread with hot numbers for reference.