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Gear box dogs look fine. I would plasti up the shells as long as you run your finger nail across the crank journals and don't feel any grooves
Far better than I expected Dom. You need to rotate the gearbox and take another pic, although it looks fine in the pic posted there could be damage underneath we can't see. Shells don't look that bad TBH, some minor pitting, most likely from contaminants in the oil sitting against the shell when it's been stood. Crank journal we can see looks ok. Primary chain looks toast TBH, but check with the tank track test and see what it looks like then. Strip the engine completely, if nothing else it needs a really good clean. Gear selectors look fine. Anything sitting in the sump? little bits etc.Looks like the dreaded red hermetite or instant gasket, really plastered it on either way. Can you see the crank markings? the printed letters and numbers? What are the letters on the back of the lower crankcase as that will show what colours you should have fitted, well within 2 colours anyway. Need more pics but looks good up to now.
Again looks ok apart from dreaded rtv jointing which has killed many honda engined after blocking restrictor jets.Take everything out, remove ALL the orange krap an thourouly clean everything.I would plastigauge the crank and check clearance.REMEMBER to keep all shells in the place they came from
You can bring me or send the block, i dont do any blasting, cleaning or painting thats down to you.Put up a pic of the inside of the lower case and lets see how much the chain has et away, 550 usualy less than 500.Mileage dont mean much on an old bike, it could have babied or totaly hammered, i know the primary dampers are as expensive as the chain but they will be rock hard now so need changing.There will be markings on the crank for pin sizes but if you cant find them bring up the crank and i will mic it for you
Agree that the bottom end assessment shows a pretty good condition overall.Something weird about it as barrels upward are generally well worn, in big contrast to the bottom end. Looks almost like two different engines have been combined that have very different service history.