I need some advice. I am putting together my '85 xr6 engine and need to re-seat my valves. i am told that some years you don't want to grind on your valves because you will destroy the hardened coating. Can I get away with grinding my stock valves? If not, what are my options. My machinist has no knowledge on Honda valves, says I should be fine unless they are ti, but his "should be fine" answer was not as reassuring as I would have liked. Any one have a definite answer?