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1976 CB550F1 (what have I let myself in for) Project
Laverda Dave:
That's exactly the same problem I had. I didn't know it at the time but the top oil control ring had a very slight bend on it only seen with a magnifying glass. I put this down to damage caused as a result of trying to push the piston in the bore. DSS wouldn't sell me a replacement set of rings as they were in a piston kit so I had to buy the whole set just for one ring! Strangely enough I had no issues with the new set, fitted great. I think you are going about the investigation in a thorough way by eliminating all possible causes even if it's long winded and a pia.
eight0:
I put one of the Conrods from my other crank on number 4 and it was fine. Took a closer look at the one I took off and... Spot the problem? Well, bugger.
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eight0:
Can I use my original rods?
The new crank and old rods make Brown, green green green all of which I have.
Nurse Julie:
--- Quote from: eight0 on March 01, 2021, 02:09:22 PM ---I put one of the Conrods from my other crank on number 4 and it was fine. Took a closer look at the one I took off and... Spot the problem? Well, bugger.
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--- End quote ---
Aaaah, the Banana con rod 😁😁😁 Rods usually bend in pairs, so it #1 rod bent as well?
eight0:
Yes! Which is why the middle two pistons were centered out outside weren't.
Think it's safer to use all 4 of my old rods?
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