Hudson started racing at the tender age of 5 in mini motocross
- By the time he had turned 12 years old he was Junior South African MX
- One year later (13 years old) Hudson had progressed to the roads and was Regional and South African 50cc road racing champion
- He then progressed to the South African GP 125 series and finished in 4th place aged 15
- Hudson then spent 4 years in the Regional 250 cc races
- Kennaugh then progressed to bigger machinery and finished 8th in the South African Supersport 600cc category aged 21
- The results really started to come in the following year when he finished 3rd in the South African Supersport 600cc category aged 22
- Finally the biggest result in his career so far, 1st in South African Superbike 1000cc aged 23
Hudson also competed in the GSX-R World Cup, where he came 2nd in France 2003 in the one off race event. He also finished 2nd in America in 2004 in the same one off race. Hudson wrapped up the GSX-R Cup 2005 championship leaving it to the very last round at Magny Cours.
While finishing off the GSX-R Cup, Hudson was offered a ride with the Moto - 1 Supersport team along side Matthieu Lagrive for the final two rounds of the championship. He competed at the famous Imola circuit and Magny Cours as well as racing in the GSX-R Cup there.
For 2006 Hudson made the decision to come to the UK to race in the highly competitive Metzeler National Superstock Championship. Riding for the Carbon Can Company aboard an R1 provided by Raceways Yamaha, Kennaugh finished the championship in eleventh place.
Now that he is familiar with the British circuits he has decided to stay put in the UK and race for the Raceways Yamaha team on the 2007 R1 once again in the Metzeler National Superstock Championship. After a brief ride on the Virgin Media Optoma Loans Yamaha Hudson returned to Raceways to compete the later rounds of the Superstock series. After a superb double win at Donington Park Hudson finished third place in the championship with 154 points.
For 2008 Hudson will race in the British Supersport series on a Yamaha YZF-R6 in the Raceways Yamaha team.
In 2010 he returned to the 1000cc machines of the all-new Mirror.co.uk BSB-Evo Championship. Starting the season with the MAR Kawasaki outfit, he was fast straight out of the box and was leading the championship by the time the series reached Snetterton. But just days before the event, he and MAR Kawasaki went their separate ways and Kennaugh joined Splitlath Motorsport, where he rode the Aprilia RSV4 machine for the remainder of the season. Dominating the final rounds he scored 30% more points than his main rival Steve Brogan in the final eight races, including five wins, two seconds and a third. He narrowly missed out on the title by just three points after winning the final race of the year at Oulton Park.
For 2011 Hudson moves into the MCE Insurance British Superbike Championship, continuing his relationship with Splitlath Motorsport for a second year. He will again ride the iconic Aprilia RSV4 machine.