My plastic shim has a lip that the intake sits flush on. Treats is out of the short shims and orings. I'll check around the local hardware shop to see if i can find anything to use.
Definitely made sure i had the card on as far forward as possible. Had a couple hands on it to be sure i had it seated last time.
No worries on the skill level. Its always nice to have more info than i need. I've been working/reading plugs on my gs500 and drz400's for a bit over a year, no expert, but starting to get an eye for it.
65 main jet in 13.13. Plug looks great which really threw me off. I'm leaning more towards a bottom end leak as well.
I ordered a full rebuild kit from treats, after i get the Garelli sorted out I'll be digging into this one.