The pit and bucket bike events are done on 150cc bikes and raced at kart tracks.
Walker will compete in the NZ Superbike Championships in the Senior Supersport class.
Last season, he raced on a Superstock 600cc bike, which compete with the Supersport bikes at the same time, but also have a separate points championship.
He finished runnerup in Superstock, and overall was 10th in the Supersports class, just behind fellow Whanganui rider Richie Dibben in ninth.
Walker made a recent trip to Victoria to watch the Superbikes at Winton Park, while he got to ride an Australian Supersportspec' 600cc at Eastern Creek, Sydney Motorsport Park.