Visited a few machine shops this morning. Different views, some think that the valve locks are OK, and that the broken valve is from rpm++. I shift at 6000, occasionally 6500.
Will call MME shortly...
The local parts guys I normally use can handle stock engines, but not this. When I explained the guy what happened and handed him the exhaust valve to see if he could find a replacement, he asked "Is this the intake or the exhaust valve?"
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