Also, the adoption of strengthened parts for the gearcase, brackets, camshafts, and other parts like plasma-fused sleeveless cylinders, iridium spark plugs, and other new technologies and materials ...

Developed by Yamaha Motor based on the Toyota 3T power unit, this was Japan’s first turbocharged DOHC engine. It had a displacement of 1,770cc and an in-line 4-cylinder layout with two spark plugs per ...