MR Moet, aiming to set a modern day weight carrying record in the Perth Cup, is the new favourite after the scratching of pre-post favourite Chester Road.

Trainer Adam Durrant, who also trains Mr Moet, said Chester Road had strained a tendon.

With Chester Road out of the $500,000 Group 2 race, Sportsbet.com.au tightened Mr Moet, winner of the Railway and Cox Stakes, to $3.80.

Mr Moet has a tenuous hold on favouritism with the Bjorn Baker trained Cantonese vying for favouritism at $4.

Lords Ransom, winner of the 2010 Perth Cup, holds the metric weight-carrying record when he shouldered 55.5kg to victory.

Mr Moet must lump 59 kg in the 2400 metre race.