Part of the problem is probably worn cams. I had that same problem with my 1H D8. Florin set me up with new cams for about $135. That did not solve the problem completely. Then I noticed the machined boss on the pressure plate where the cams work was pitted and cupped. I was able to get in there with an angle grinder and dress it off flat again. The clutch is definately the weakest link in the older D8's, there were many upgrades during the 2U series.
Yes it snaps in good now. I haven't done any work since so it is not tested yet. The wife won't let me do any work with it. She was complaining about looking at it a while back so I cut a road into the bottom where I could park it out of sight. She has been complaining ever since that I built a "super-highway" without permission.
Now I need to flip the cutting edge but the pony wont start. It has been too hot to work on it. I am going to have to get into the mag and try to clean the points. I tried leaving the pony right after the impulse clicked hoping the points would be open but it didn't help.
my bet , its out of adjustment.