What would be a good place to make a port and polish and head mod on an 1985 Tri-Z? Most place specializes in the 250R but not in the Tri-Z. Anyone knows of a good place to do this type of work on a YTZ250?

nice looking bike, I had one just like it along time ago. One thing to watch out for is your front fender, if you notice the air intake is behind the louvers. Their was a factory recall for that fender. It was replaced with a front fender with no louvers in the back. At high speed air is funneled into the air intake and causes a major lean condition and then meltdown. I have thought of doing a 3 wheeler again, some day I will.