Well, I'm not familiar with that specific year/model, but looking it up it looks like it has normal hydraulic front brakes. Barring something weird specific to that particular bike, the front brakes should not need "adjusting" if everything is working properly.
What sort of issue are you dealing with?
Some general maintenance you WILL have to do on the front brakes:
Change the fluid every few years
Make sure it is topped off/not leaking
Make sure the pads have adequate thickness
Make sure the caliper can slide freely on the pins.
properly bled brakes.... usually don't need adjusting.
how to bleed brakes.
forget the tube and can method.
brakes require that the bleed hole be higher than the inlet hole.
where a guy might push the plunger to fill the reservoir of the caliper, if there isn't any fluid in the tube and reservoir, it will just pump air into the caliper.
take the bleeder out, clean it out...good.
so. fill the reservoir, and pump it until it goes down some, and don't let the fluid drop to the >min< mark in the reservoir. pump slow and strong.
when fluid starts coming out of the bleed hole, close the bleed hole, release the pump, refill the reservoir, open the bleed hole and pump. you will need a bid bleed hole... so open the bleed hole plenty. when no air exits, the caliper reservoir is usually full, but( some systems require priming first) if you keep getting air, you have a bad hose, or a bad master cylinder plunger or a cracked reservoir or something.
stick the tube and can method in the trash, clean up the horrible mess you made in the shop..(man this stuff is like slicker than snot, so be very careful where you step) there is no way to properly bleed brakes. they are either bled or they are not.
Cool .. barn find that has me fixing almost everything ..EVERYTHING has needed adjusting ! No need to adjust these is great news .. this is a rare 2 year production..80 & 81 ..hard to find info .