SOHC.co.uk Forums > CB750
750 K2 Strip & Rebuild - help please
Lobo:
Hi all, the big difference to this rebuild thread is that I’ll only write when begging for help as I simply can’t otherwise compete - given the skills of most on here.
So, today broke my ‘750 K2 down into component parts, for no other reason than I want to, ie pretty the old girl up to how the showroom would have had her in 1973. The engine’s running fine; but I will go through it … tho’ not anticipating any major issues. Menno has kindly painted a body set for me, and all other bits will be plated / finished iaw OEM … as far as possible.
Today’s questions please:
(1) Not mentioned in my manual, but I understand the ‘Connecting Rod’ (ie big end) bolt (& nut I guess) are the yield type .. ie one time use only. Are there ANY OTHER such fasteners in the engine that I should be ordering rather than reusing? I’ll assume the old ones are good for torquing down wrt Plastigauge checks?
(2) I failed to remove the Advance spindle from the RHS of the crankshaft - I bottled out after applying as much force as I was comfortable with. (I was working on the assumption of RH Thread and counter clockwise rotation iaw the American forum btw). So… tips please on ultimately removing this with no tears.
Ta for now.
Nurse Julie:
Con rod bolts can easily be used again if not stretched. The manual also states to plastiguage the shells up on the con rod, so what are you supposed to do, fit a new set of bolts everytime you do them up, nah, I think not.
Bryanj:
As Julie sez con rod bolts, and in fact no bolts on the 750, are not "stretch" bolts and can be used again
Lobo:
Appreciated Julie / Bryan - thanks. Got this ‘duff’ info off a YouTube clip on plastigauging - he called ‘em yield bolts and was adamant one time use only.
Ho hum.
Lobo:
Crankshaft this time…
1973 Motor, but NOT showing up in my predominantly K0/K1 workshop manual is the bush on the generator side of the camshaft. It looks to me like a mod, with obviously the carrier modified too - comments.
Next up the lobe specs do not tally with those in my manual, the exhaust lobes are more-or-less within spec, but the inlets consistently below spec. The base diameter of all lobes are nothing like book figure…
On a search I found ‘comforting’ news wrt K2+ on the American forum, but again thoughts please.
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