Jamie McCanney was the pick of the Manx riders competing at the second round of the Maxxis Enduro World Championship in Argentina at the weekend.
Competing in the Youth Cup, the 18-year-old secured two first places, meaning he tops the standings.
His older brother Jamie, fresh from being named the Isle of Man's under-21 sportsman of the year, was second and third in the Junior class.
Meanwhile David Knight picked up two fifth-place finishes for the second consecutive week.
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Fresh calls for more MGP and Classic TT marshals
Officials say assistance especially needed for first few sessions