Held at the popular Barret Rd motorcycle park facility , on the outskirts of New Plymouth , the Interdrill Ltd-sponsored two-day event produced the highest calibre of racing , and the large number of spectators in attendance certainly appreciated the entertainment factor . Riders aged between 4-11 years – and riding bikes with engine capacities anywhere between 50cc and 140cc – bashed handlebars in a series of high-intensity races and there is little doubt that some of the riders will go on to carve out national or even international careers for themselves in the future . There was plenty of inspiration on hand , with the pit zone bristling with former superstars of the sport , all now the proud parents of today ’ s rising stars in mini motocross , considered a nursery ground for those starting out in motocross . One of those riders perhaps with a big future is Palmerston North ’ s Colton Whibley , the 10-year-old son of former Kiwi international champion Paul Whibley , who dominated the premier 9-11 years ’ 65cc class at the weekend . Young Whibley was kept honest by another son of a former champion , Case Wilson , the eldest son of multi-time former New Zealand cross-country champion Paul Wilson , a man who was also a winner of the fabled Tarawera 100 cross-country marathon back in 1998 . Colton Whibley finished 1-3-2-1-2 in his five races over the two days , while Case Wilson managed a 5-1-1-3-3 score-card , enabling Whibley to take the title by eight points ,