Yamaha’s latest “Yard Built” series makes use of the XSR900 GP as a platform for a retro-inspired racer wearing the colors of 13-time 500cc winner Randy Mamola, and his 1987 YZR500.

Only Randy Mamola (19 years and 261 days) and Eduardo Salatino (19 days and 274 days) have managed the feat at a younger age than Acosta, who ascended the Portimao rostrum on Sunday at the age of ...

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