Front brake sticking

I’ve joined the forum because my father owns a 2000 Yamaha Kodiak and has lots of questions. He’s 67 and doesn’t like using the internets so he’s asked for my help. This seems like a good forum to be a part of 🙂

Recently, he’s had a problem with the front brake lever sticking when he squeezes it to stop. The brakes themselves work fine, but they won’t release on their own. If he pushes the bake lever forward to disengage the bakes, all goes back to normal.

I’ve used the search function but only come up with stuff where the brakes don’t stop the bike. Where do I start looking to diagnose this issue?

J