Brandon's father, Mick Demmery, yesterday revealed it would cost $80,000 for the young motorbike star to race in the supersports 600cc series next year.

Speaking to The Daily Advertiser yesterday, Mick Demmery said the bill for the 600cc campaign would be $30,000 higher than the 2014 figure.

"The budget was $50,000 for the 300cc races this year," Brandon's father said.

"It's amazing. I don't even earn $50,000."

Backed by a band of "loyal" sponsors in Wagga, Brandon Demmery was not only able to compete across Australia, and overseas, but win two major titles.

Riding for the last time in 2014, Brandon captured the Australasian FX300 Championship and AFX 300 Championship at the weekend.

For the Demmery family, the dual motorbike crowns were as much a reward for Brandon's immense racing talent as his parents fierce determination to give him a chance to succeed.

In wrapping up the two top titles in his division this year, Brandon has continued his remarkable rise in motorsport.

And the Wagga young gun is eyeing ever greater challenges in 2015.

Fresh from stunning success in the 250cc and 300cc divisions in the past two years, Brandon will jump aboard an explosive 600cc supersports bike in 2015.

However, he will sidestep the chance to compete in Europe to mainly race in New Zealand and Australia.

"Brandon will do the summer series in New Zealand from January to March before the Australia season," Mick Demmery said.

"He could have raced in the Asia, but the level os exposure wouldn't be the same as in Australia.

"We owe it to Brandon's sponsors to race here."

Mick Demmery is adamant stepping up to the 600cc division will be a "learning curve" for Brandon in 2015.

Significantly, Brandon will be following a trail blazed by Tumut racer Brayden Elliott this year.

Elliott has competed with great success on the 600cc circuit this year and will be racing alongside Demmery in 2015.

Level-headed Brandon is excited about the year ahead.

"Next year I will be stepping up to a supersports bike, but have not entirely ruled out doing another year on the 300cc (bike) to defend my title," he said.

"Budget will determine what we eventually do.

"I now intend having a couple of days off from training before I board a flight to New Zealand on December 4 to test the superlight bike."

Fighting a virus and oppressive heat, Demmery rode brilliantly to win clinch the dual titles at the weekend.

"I secured the AFX Championship after the first of three races on Saturday," he said.

"I woke up Sunday still not feeling the best.

"I tried to relax as much as possible between races to conserve what limited energy I had."

Despite the discomfort, Demmery rode in three events on Sunday, ultimately taking the title in the final event, edging out keen rival Kyle Buckley by the narrowest margin.

"I want to congratulate Kyle on a fantastic year of racing," Demmery sad.

"To have the championship decided by 0.003 seconds shows just how close it was."