Action on two wheels dominates this week's round-up of news from the action sports world.
Phillip Island gave us one of the more eventful days on this season's MotoGP calendar. The Australian GP was shortened to 19 laps, after a new track surface lead tyre manufacturer Bridgestone to refuse to guarantee the safety of their rear slick beyond 10 laps. This also meant riders had to undergo a mandatory bike change on or before lap 10.
This rule proved costly for Marc Márquez, when he was disqualified for staying out one lap too long. The race win went to Jorge Lorenzo, with Dani Pedrosa taking second, meaning that Márquez's championship lead has been slashed to just 18 points with two races remaining.
Still at the MotoGP, we saw Luis Salom manage a third place finish in the Moto3. The Spanish rider finished behind Alex Rins and Maverick Viñales and still leads the championship by five points.
In the AMA Supercross, the headline of an exciting event was a return to form for James Stewart, as he took the win in Las Vegas. Second and third places on the podium went to Red Bull KTM factory riders Ryan Dungey and Ken Roczen. Things could perhaps have turned out differently for Dungey, had he not been penalised five places in the first of the event's three motos for failing to ride through the joker lane.
Over in Chile, Colombian mountain bike star Marcelo Gutierrez took part in the fourth Talcahuano DH Industrial as a specially invited rider and duly took first place in the urban downhill event.
The Rally of Morocco saw Spanish rider Marc Coma take second place and banish a few demons after dislocating his shoulder here at last year's event. Coma looks in good shape to challenge for a fourth win at the upcoming Dakar 2014.
Finally, it's off the bikes and up the wall, as South Korean climber Ja-In Kim took second place at the IFSC World Cup lead climbing event in Wujiang, China. The 25-year-old from Ganbuk-gu, Seoul, currently leads the 2013 World Cup by 10 points.