Topic: Cb550 rebuild: in need of some serious advice

[700504]

Currently working on rebuilding a 1978 cb550k for a friend. I've done motor work on several 750's and a 650 in the past and haven't come across the same issue as I'm having now. To make it short: I got to where I was honing the cylinders and notice the scores you can see in the attached pic. Catch a fingernail on it but if you press you finger really hard on the wall and rub; you can feel I very very slight dimple in one spot. What are my options? I'm feeling leery about this cylinder right now.

[strynboen]

find a used sleeve heat up cylendetbank and press it inn...think it vil rattel a lot ..use that one..the piston rings have be rusted in..and broken Loose..leave a korodet ring in the cast iron

[calj737]

Replace or over-bore. You might try a rigid hone out of curiosity if availability and costs are impediments.

[700504]

Thanks for the advice guys, we're trying to find out all the options

[700504]

I'll post it to parts wanted as well, but does anyone out there have just one standard bore sleeve for sale? Or should I get a whole othet set of jugs and make one out of two?

[700504]

Just posted it to parts wanted for either a whole set or single sleeve, even if we have to go with a whole set, it'll be cheaper than a re-bore (since we've already purchased the rings and gasket kit).

[strynboen]

im in Europa so cant help.

..but i have used" a. used".(.2# used???..dont get that English)..... sleever and piston on my 400 four..and it vork just as fine as it vas new..so you are fine vith a used sleeve in spec kondision..but if you can..get the piston and rings vho run in the same part..then it vill be ekstra fine..a light ball /Flex hone if you use nev rings..

[700504]

Thank you very much. Currently talking to someone on here with a set of cylinders. Hopefully they all check out fine. If not I'll be forced to replace the one sleeve. Already have new rings, already cleaned the pistons. Started honing then i found the pitting.