ATHLETICS: Champion Australian walker Jared Tallent admits he's lost some motivation to compete after the man who beat him for a London Olympic gold medal was banned for doping in 2012 but allowed to keep the title and defend it in Rio next year.

It was revealed on Tuesday that Russian Sergey Kirdyapkin had copped a three-year, two-month suspension, backdated to October 2012.

He also had results annulled from select periods between 2009 and June 2012, including a World Cup title from May 2012 that will likely be re-awarded to Tallent who finished second.

But the punishment, handed down by the Russian Anti-Doping Authority (RUSADA), doesn't cover the London Olympics - held just a few months later - where Kirdyapkin won the 50km walk ahead of silver medallist Tallent.

To add insult to injury, the ban expires in time for him to contest the 2016 Rio Games.

"I'm totally shocked the way the bans have come and results annulled," Tallent told AAP.

"It's like they've just cherry-picked certain periods of time.

"I can't understand how ... he gets to keep his Olympic gold and then he's given a three-year, two-month ban so he can return for Rio. That's just outrageous.

"It's like the Russians are laughing at the rest of the world, saying they can do whatever they want. It's just crazy."

Tallent labelled it a "kick in the teeth".

"It definitely makes me angry," the three-time Olympic medallist said.

"It's affected my motivation a bit over the last year.

"Now I'm quite angry, especially after today. Hopefully that'll continue on until 2016 so I can right the wrongs."

Kirdyapkin was one of five Russian racewalkers banned for doping by RUSADA on Tuesday.

According to Tallent, that brings to 21 the number of athletes coached by Viktor Chegin that have been either suspended or investigated for cheating.

The 30-year-old has been at the forefront of an online campaign to ban Chegin, and has helped exposes a number of athletes caught competing while serving bans.

He has accused Russia of a cover-up and called for their athletes to be banned from the world championship and stripped of hosting rights to the next two World Cups.

"It just can't go on," Tallent said.

Athletics Australia said it fully supports Tallent's hard-line stance against doping in sport.

"(We) wish him every success as he continues to represent Australia on the world stage in such a professional and fair manner," a spokesman said in a statement.