Missing rear brake, drum or disc?

[82xs400sj]

I Hey, just got this old barn find home and got the engine idling last week so I'm going to go ahead and try a rebuild. The bike has no rear wheel, chain or brake tho.
I need to figure out what kind of brake it is set up for disc or drum.
The front has a disc on it so can I assume the rear was a disc also? Reason I ask is because it looks like it has a support arm for a drum.
If anyone could have a look and throw some ideas at me that'd be awesome.
Also can aftermarket full brake assemblies be purchased for these bikes?
Thanks!

 

[willem]

my advice is to get another parts bike, if you're buying parts separately you will spend all your cash and it's never going to be worth it..

rear brake is a drum on almost all the xs400 models, only a few seca's (dohc bike, you have a sohc) were fitted with a disc at the rear. Not to worry though, the drum brake is perfectly adequate for these bikes.

 

[xschris]

That bike had a 16" rear drum mag.

 

[82xs400sj]

Thanks!
I hit the classifieds up today looking for a parts bike. I found a decent looking Maxim 400 that isn't running. Would you say that enough parts would be interchangeable between the models to be worth the purchase?

 

[xschris]

It is a different bike and most parts will not work. You need to find a sohc model.

 

[rshutchinson]

Check and see if there are any motorcycle scrap yards around you if you don't find another cheap bike locally.