Was very sad to learn of Phil McDonald's untimely death here in Tulsa a few days ago. Phil was a talented racer, tuner and mechanic. His family still owns and operates K&N Yamaha which is the oldest Yamaha dealer in the USA. Godspeed Phil !
https://www.roadracingworld.com/news/racer-mechanic-tuner-phil-mcdonald-r-i-p/