"Rage Against the Machine" drummer (and co-founder) Bradley Wilk has a solo in his future ... 'cause his wife just filed for divorce, TMZ has learned.

Wilk -- who's also beaten the skins for Audioslave and Black Sabbath -- had separated from wife Selene Vigil-Wilk just last Friday ... and 3 days later, she filed the paperwork in L.A. County Superior Court.

According to the documents, obtained by TMZ, the two tied the knot back in 2005 -- and have 2 young children together.

Selene is asking for joint legal custody ... but she wants primary physical, probably because he's a famous rock star ... and rock stars often go on the road.  She's also asking for spousal support.

Calls to Wilk have not been returned.

Tom Morello from "Rage Against the Machine" says everyone needs to stop bitching about Jay-Z and Beyonce's Cuba  trip.

Tom was out in L.A. Friday, when our photog ask the rocker -- who's a pretty well known political activist and founder of the non-profit "Axis of Justice" -- about the controversial trip to the country famous for cigars and human rights violations.

Unlike lots of others ...Tom had their back.

In the process he dropped some Cuba knowledge ... explaining how to get in and out of the country ... legally.

Check it out.

Republican VP hopeful Paul Ryan should've thought twice before saying he's a fan of Rage Against the Machine -- because the band's bassist tells TMZ, it makes Paul look like a complete idiot.

Tim Commerford was out in Malibu this week when we asked about Paul's love for the notoriously left-wing group -- and Tim responded, "Clearly [Paul's] not smart to be admitting that."

He adds, "It seems like it's stupid for him to even bring it up, so he's obviously not that smart of a guy."

Tom Morello -- Rage's guitarist -- has already ripped Paul over his fandom, saying, Paul "is the embodiment of the machine that our music has been raging against for two decades."

You'll recall, last time we spoke to Commerford he hinted at a new Rage album in the works. This time we asked if the new album was for real, and Commerford replied, "DEFINITELY ... maybe ... Anything is possible."

Thanks for clearing that up.