Compression test

I have, in my possession a 82 430XC, which I'm thinking of buying. The bike is in pretty good shape for its age. The owner has let me bring it home to check it out. I have done the usual things that you do to bikes that have set. I've cleaned the carb,tank and checked for spark.

The bottom line is I can't get it to start. So I checked the compression and after about 8 kicks 80LB. is all there is. Not being a 2ST tuner my question is: Is there anything special that I should do when checking it? I did remove the slide, what about the reed valve?
My understanding is that these motors a known to have crank seal problems. Will that effect compression?

I have read that this model is worthy of spending some time and money on because they can be made to run and handle very well. This is why this bike interests me. What about shop manual? Thanks

I also have a 82 430XC, and when i got it it had 60psi cold with throttle open. It would start fine but would not rev out.
I got it bored out with new piston/rings and now it revs good but i only get 90psi cold.
I have never done a compression test warm as im sure that big piston must expand quite a bit and give me better readings.
If you have a cracked reed or they are not seated then it would be harder to start.

Thanks everyone for the encouragement. Money is a little tight right now, to say the least. On the other hand, it is owned by the guy that does my farming, so I think maybe we can work something out.

Kelly, nice pictures and story, thats the bike, this one looks to be all stock I guess. Only difference this bike has a red tank, straight too, with original paint. I'll post a pic. when I get the tank back on.
Kinda pumped

Second that.

Xcuvator,

Third that. Post up photos. I (and alot of other folks, I think) enjoy seeing what others are doing/repairing/riding. Best of luck w/ your starting issues.

Rick