Join Date: Oct 2006
Location: Green Bay, Wisconsin, USA
Make: GL1500 SE
I have never heard that the seats are stellite, just the valves. Grinding the seats is permitted by the manual.
The reason you can grind the seats but not the valves is because the seats are solid stellite. You can't grind through the hard stellite like the valves. Most seats (maybe all????) on aluminum heads are Stellite.
Worked on the "big rigs" for 45 years now just riding my Wing whenever I can. Gets cold in Wisconsin.