Former world champ and tuner supreme Kel Carruthers (left) posing with Yamaha’s Masayasu Mizoguchi during the Italian GP in 1986. Mizoguchi who headed Motor Sports Development Operations for Yamaha in the mid-1980s. Mizoguchi won the Tomizuka Prize in 1985 for R&D and practicalization of an exhaust timing control system for high-performance 2-stroke engines, Yamaha’s Power Valve System (YPVS). 📷Paul Carruthers #kelcarruthers#MasayasuMizoguchi#ypvs#yamaha#yamaharacing#motogp#yamaharacingteam#monza
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