James was married to the 47-year-old Oscar-winning star – his third wife – for five years before their relationship ended in 2010, amid allegations that he had cheated on her.
But although The Proposal star has since moved on with her life, her 42-year-old ex is still making digs at her.
The motorbike mogul is making a return to reality TV on American Chopper: The Build-Off, where he goes head-to-head with the show’s stars and custom motorcycle manufacturers Paul Teutul and Paul Teutul Jr to build a new bike.
In a sneak peek from one of the episodes obtained by US entertainment website Radar Online, he talks about how he became estranged from his biking friends and appears to blame Bullock for the recent lull in his career.
He said: 'I became a big shot and married some Hollywood actress and didn't talk to anybody anymore. So I feel bad.
'I feel obligated to reconnect with all these people and show them that I'm still the same fabricator motorcycle guy. I'm not what I became.'