Bubbagates, I noticed that the throttle arm had a single o-ring that appeared undamaged so I'm guessing that the o-ring under the carb would be okay as well. I inspected my high-speed needle and it appeared to be in perfect condition, it didn't have any damage on the end of the needle. I would rather not take the engine apart but if you guys think that it warrants it then I will. I have a small bit of a mechanic background so I know to handle the disasembly and reassembly but all my research points to only disassembling the engine if I have to.
I just caught up on here. If it will no longer run after a new plug and fuel then I still think you are having an airleak issue. But you also mentioned that it does not seem to make allot of compression and being that the engine sat around for a long time, maybe it's just time to tear it down and rebuild it. It's not that tough.
To make matters worse, We have a senior member at our club that has a brand new Supertiger 75. When you flip this thing cold it feels like there is not compression and will not start at all by hand propping it.
Once we put an electric started to it, it kicked over. We then got it tuned and it's been a screamin' little banchie ever since, but it will not hand start.