[4][9] The Jones family's modifications proved to be so successful that his race results came to the attention of the Yamaha factory who asked to take their motorcycle back to Japan for testing.
[3] Jones then competed in the 1972 Inter-AMA series which featured the top European motocross riders visiting the United States after the finish of the F.I.M.
[11] Some of the European competitors included; Torleif Hansen, Arne Kring, Gunnar Lindstrom, Dave Bickers, and four-time FIM 250cc World Champion Torsten Hallman.
[11] His impressive performance marked the first time an American rider had scored an overall victory in an AMA-FIM sanctioned motocross event.
[12] Jones considered his victory against a field of top competitors in the Boise Inter-AMA event to be his proudest racing achievement.
[11][14] Also in 1972, Jones travelled to Europe as a member of the first American team to compete in the Motocross des Nations event.
[5][13] When the hand-built, custom racing motorcycles proved to be too brittle, the Jones family reverted to modifying production Honda CRs.
[16] Jones was then contracted by the Bombardier Corporation (manufacturer of Ski-Doo snowmobiles), to race for their recently formed Can-Am motorcycle division.
[5][17] The decision would exclude the defending 500cc national champion Dutchman Pierre Karsmakers who was set to compete against Jones in the 250cc class.
[5][17] Despite his exclusion from the overall results, Karsmakers competed for the Yamaha factory team and won three of the nine rounds of the 250cc national championship.
[1][10][18][19] Their intent was to achieve sales success by having Jones compete aboard the motorcycles in the AMA motocross national championship.
[18] Jones competed on an Ammex motorcycle during the 1976 250cc motocross national championship with his best result being a 10th place at the Sears Point race.