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Mike's CB550 Project
Mike_Berkshire:
Thanks guys. As there don’t seem to be any mechanical issues (apart from my back) I will put the bottom end in first. I’m some way off that yet mind!
Mike_Berkshire:
Hi all, progress has been slow but there has been progress. At my rate of work I think I am 3 weeks or so away from putting the top end back together. I have been through the plastic bags and boxes of bits to check out the parts Im going to need next and the rear cam chain tensioner mechanism has resurfaced. When I was stripping the top end I had a problem removing it from the barrels as the tensioner adjuster nut on the outside of the barrels had been done up super tight and the screwdriver slot in the central threaded adjuster (M6?) had been broken away on one side.
Im guessing this isn't uncommon and I wondered if there are any fixes other than paying DS £200 plus postage for a 'new one'? Please let me know if there are and what to do.
From reading some of the replies I got when I first mentioned the damage I got the impression that a way of dealing with this is: compress the adjuster whilst fitting it to the barrels and holding it against the camchain tunnel wall where the adjuster pokes through, tighten the nut (above washer and O ring) to retain it in the compressed position, refit barrels, head, camchain, set cam timing etc and when all together release the adjuster nut to allow the tensioner to tension the chain and nip it up in that position. Again, any thoughts on this approach would be very much appreciated.
Mike
Johnny4428:
Would there be enough of the m6 threaded part to tidy up the end and cut a new slot in the end?
Mike_Berkshire:
Thanks Johnny; from recollection (when I was stripping it down) I don't think so but I can check once the paint on the barrels has dried and see how much protrudes; that would be ideal.
Bryanj:
There is no properrepair except replacement, all500 and 550 fours are the same, the adjusting method you wrote is fine as long as the nut spins freely on the thread, you are not supposed to use the slot for adjustment anyway.
Before you fit the assembly i suggest you check that the teeth on the rack and bolt engage properly as forcing the crew can spread the main side plates and you loose proper tooth engagement or even damage teeth
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