The Kogi Korean BBQ taco truck goes viral.

A long line forms in front of the Kogi Korean BBQ taco truck in Little Tokyo.  (Barbara Davidson / Los Angeles Times)

The menu posted outside the Kogi Korean BBQ taco truck. Tacos are $2.  (Barbara Davidson / Los Angeles Times)

Kogi was Choi’s first breakthrough success and it arguably is still his most famous brainchild. Combining Korean barbecue with Mexican tacos, Kogi tacos are still wildly popular.   (Barbara Davidson / Los Angeles Times)

Customers pick up a large order of food and get ready to take it home.  (Barbara Davidson / Los Angeles Times)

Julie To waits in a two-hour line for her food.  (Barbara Davidson / Los Angeles Times)

Carla Brizuela and Leilani Bermajo enjoy their tacos on the steps of the Japanese American National Museum in Little Tokyo.  (Barbara Davidson / Los Angeles Times)

Chef Roy Choi works non-stop making tacos with a small crew in an even smaller truck.  (Barbara Davidson / Los Angeles Times)

By the end of the night there aren’t many drinks left on ice at the Kogi truck.  (Barbara Davidson / Los Angeles Times)

Many customers follow the Kogi truck via Twitter feeds.  (Barbara Davidson / Los Angeles Times)

The roving food truck was Choi’s first breakthrough success and is arguably still his most famous brainchild. Fans line up for the tacos and burritos that combine Korean and Mexican flavors.   (Barbara Davidson / Los Angeles Times)

Harry Um enjoys his Kogi tacos in Little Tokyo.  (Barbara Davidson / Los Angeles Times)