No oil in the front hub, just grease by the speedo drive gear. Never have figured out what the Phillips screw on outside of brake panel is for or long forgotten but I've never see any oil in the dozens I've taken apart and cleaned.
I don't think I'd be sourcing a left case just yet. Slim chance you'd find one with close numbers. Think at worst the chain guard might have a little rattle. That looks like a hard repair, probably could get it welded and drill/rethread hole. I have a bike with same issue but doesn't make any...
It's on bottom of engine about where gear shift shaft is. Remove bolt, loosen slotted tensioner, spring will prolly come with it. Should help with the cam gear install. Replace tensioner spring and tightener till feel good tensioner. Might look at a parts diagram to see how it really works.
Did you loosen the cam chain tensioner spring? Sometimes I take a small needle nose pliers and one point in the center hole and other in rearmost hole and give a little squeeze, should just jump on then.
Mecum auction prices are same way. My guess is a bunch of super rich drunk guys that never had one as a kid or some kind of tax/charity write-off. I see some craig's listings that quote these insane prices when their selling their junk. Guess I probably would too, lol.
I agree with CJ, someone prolly didn't loosen the axle bolt when adjusting. Left side has obvious horseshoe bend at the back versus 90 degree bend on right side. I'd prolly tighten the axle bolt without adjustor on and do a little hammer love tapping on that bracket.
WOW!! That bike looks amazing and it's my favorite color. On a side note I never replace the exhaust bracket packing as I'm afraid it'll start to rust my new pipe. Never really had an issue with rattling without. Love that color!
I don't think it's wrong at all, seems like your following your plan to enjoy both bikes. Just keep the original parts incase you decide return to original. There your bikes, do what's necessary to enjoy and preserve the family history.
If you go to Dratv website click performance parts section then what fits what section it shows various ring orientation. The dot on cam sprocket lines up with notch in head next to cam sprocket. Piston needs to be top dead center when installing cam chain. Sometimes have to turn cam a little to...
What year CT70 do you have? They stopped putting the skid plate on in 1978. Apparently Honda figured it didn't need one so I would say it's purpose was always just a rock/mud deflector to keep from damaging bottom engine cases.