81 430 cr rear brake pads

I just bought a very low hour 81 430 cr.

The rear brake is out of adjustment and I dismanteled to take a look and clean everything up. The pads look like new and were not dirty at all. Surprisingly, the pads are not like the ones on my 81 430 xc. The cr pads are narrower, and have an alignment groove on the fixed pin side of the backing plate. The cr pads are a little more than half the width of the brake drum ( the xc pads are about .75% of the brake drum).

The brake drum shows no wear, yet there is no adjustment left. I have no problem ordering new pads, but after seeing no wear anywhere, I am not optimistic about getting full adjustment.

Any ideas????

I can't even get a toe on the brake lever most times I have gone for it. Add to this that as a long time road racer I use the front almost all the time anyway and you can see where this is going. ....... I think it will be a long, long, long time before I will ever need replacement pads on the rear of my 81 430 XC.

Wonder if someone had put the brake cam in wrong before? Was the brake arm pointing towards the rear or pointing towards the front? If the rear axle is also towards the very front of the swingarm slot it will cause the brake arm to be more towards the rear affording more adjustment. Wonder if someone may have put a longer rod like off of a XC on it were the brake pedal is further foward. Look at the brake rod and see if it has the tab for the spring at the chain guide. I put 83 XC wheels and brakes on my 82 CR, DLS front and wider rear shoes than the CR.