My 78 T140E has been sitting for over ten years. For some reason I’m home more now than before, (state/virus no travel orders), so I’ve decided to get it running. Upon kicking it to start it today, the kickstarter process is rather lame. It feels like there is less compression than before. It does not have the same strong feel as it once had when it had lots of compression. A couple of years ago I replaced the clutch with a seven disc set-up. What could be causing this?