In his first year of racing, in 1931, Milliken won the Victorian road time trial, covering the distance in 53' 45". Milliken initially rode a Preston Star bicycle, but by 1932 he was riding a
Malvern Star bicycle. and was coached by
Bruce Small. In 3 consecutive years, 1931, 1932 and 1933 Milliken set the fastest time in the
Colac to
Melbourne amateur road race, and in setting the fastest time, Milliken won the Victorian road championship title. His 1931 time of 3h 45' 54" was a course record, breaking the 1925 course record of A. L. Quinton (Vic.) of 4h 11' 47" and what was claimed to be the world competition record of Frank Hose of 3hr 46' 25" set in the 1931 Camperdown to Melbourne race. Milliken broke his own record in 1932 with a time of 3hr 35' 15". All bicycle racing in that era was on
fixed-gear bicycles and Milliken was reported to have ridden 92
gear inches. One of the first races to allow
derailleur gears was the 1933 Melbourne to Castlemaine, promoted by Bruce Small Pty Ltd. The race was also notable for being a
scratch Race, instead of the more usual
handicap race races. Milliken won the race using a 3-speed derailleur made by the Cyclo Gear Company. Milliken won the
Melbourne to
Castlemaine again in 1934, knocking 40 minutes off the course record. Milliken won the
Goulburn to Sydney in 1932 and twice set the fastest time, in 1932 and 1933. Milliken’s time in 1932 of 5hr 46' 10 1/5" was faster that the professional cyclists race. Milliken rode strongly in
individual time trials, often referred to at the time as unpaced races, including the then
Olympic distance of . In 1931 he won the 20 Mile Victorian time trial and twice won the Victorian time trial, in 1933 and 1934. Milliken won the 1932 Australian championship time trial at
Hobart, Tasmania , but in a rare defeat, he failed to defend his title in 1933, beaten by J Buckley who also broke Milliken’s record. Milliken regained the Australian record in winning the Victorian time trial in 1934 in a time of 2hrs 45' 42". Milliken again finished 2nd in the Australian championship time trial in 1934, this time to C Winterbottom. Milliken broke 11 records in 1933, including the Sydney to
Newcastle record in 5hrs 21' 27", the first attempt using the newly opened
Sydney Harbour Bridge. Milliken won the Melbourne to
Wonthaggi time trial, and event that the first carried with it the title Australian amateur road title. Milliken rode the in an Australian record time of 3hrs 45' 54". While Milliken was best known as a road cyclist, he also competed on the track, such as in promotional events at Goulburn in 1933. In 1934 Milliken set yet more records, breaking the world 25 mile amateur record by winning the
Campbellfield Open Road Race with a time of 59' 6" . Milliken also set the fastest time in the Melbourne to
Geelong in a new course record of 1hr 23' 55". Milliken was touted as a potential
Empire Games and
Olympic Games medallist, however no road cyclist was selected for the
1932 Olympics and Milliken did not finish in the 1931 Australian road championship . There was no road event at the
1934 British Empire Games. Milliken decided not to wait for the
1936 Olympics and turned professional in 1934. ==Professional career ==