74 DT 360A  want to replace oil seal for the clutch arm that goes up from bottom of engine. what is the procedure, how do I access the seal, I see the adjustment nut under the sprocket cover, just don't really know what i am getting into?  Anyone know the procedure for this.

Try:
* drain oil or tilt bike over to R.
* remove clutch cable, taking note of spring placement
* loosen adjustment screw, gently turning arm L and R while loosening. Do not force.
if all works out, slide clutch arm slides out the bottom. The seal easily pops in/out.

Disclaimer: last time I did this the pressure plate was off my bike. ie, R cover removal. Worse case, you ~may need to do this to remove the pressure of the shaft on the lever arm. I want to say if the arm is at an angle it will slip on past shaft.