NO!, no additives, which are friction modifiers, not good for wet clutches. I think once you have breather unplugged you should be all right.
Any consistent blue smoke? Blue smoke on startup? it's either rings or valve guides. No after market snake oil remedies with wet clutch.
Do a compression test, and see how bad the situation is. If you are burning that much oil, don't waste money on expensive synthetics or high end...
I just re-did my instrument cluster and yes knob is counter sunk for screw. Check with classified for '83 being sold for parts. I got my dash from...
I found these guys online, but they only work on aluminum radiators. www.motorcycleradiators.com
One of my first mods was Heli-Bars with Vibranators, they work!! ( and you don't have to mess around getting OEM dampers out)
Stock exhaust? Shine a strong light down the muffler and see if you see anything.
Only thing I can think of is a rust hole on the bottom of muffler.
I believe there is a previous thread on this subject.
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