Moss has spoken out saying he does not accept the results and is in the process of challenging those results through the appropriate processes.

Below is Jake’s message posted via social media,

As you may know, I recently announced my retirement from racing.

As I said at the time, this decision to retire was based upon my decision to focus on my family and career away from competitive Motocross ad Supercross racing.

I have recently been advised through Motorcycling Australia and ASADA that I have allegedly tested positive to Ostarine, which is prohibited substance under the World Anti-Doping Code.

I do not accept the results of the test and I am in the process of challenging those results through the appropriate processes.

Ostarine was first developed to prevent and treat muscle wasting, as well as osteoporosis. It is referred to as a “Performance Enhancer” and is claimed to improve an individuals endurance levels.

The announcement comes just a week after the former Kawasaki rider announced he is stepping away from professional racing, which Kawasaki stated Jake was “deciding to focus on his family and career away from competitive Motocross and Supercross racing.”

Jake then commented, “I have greatly enjoyed my time with the Kawasaki team and hope that in the future I may well be back to contest titles again,” Jake stated.