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1976 CB550F1 (what have I let myself in for) Project
eight0:
They are aftermarket, but he rebored each one to match each piston so the clearance was to the spec in the manual.
Or am I not following you..
Nurse Julie:
--- Quote from: eight0 on February 26, 2021, 03:14:06 PM ---They are aftermarket, but he rebored each one to match each piston so the clearance was to the spec in the manual.
Or am I not following you..
--- End quote ---
Different piston manufacturers have different specifications for their piston to bore clearance depending on alloy / silicone ratio. But, it really should only be evident when the engine is hot for the 1st time after rebore. This is when the engine will seize due to not enough piston / bore clearance when everything expands. Have you checked that you have the con rods on the crank the correct way round?.
eight0:
I really hope so. I put them back on the same way they were on. Letters facing forward, numbers backwards.
You can just make it out in this photo.
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philward:
Conrods should be installed with 'bearing key' facing forward - 'bearing key' is the bearing locating notches
eight0:
I can't say for certain then. I put them on how they were but as I bought the replacement crank from DK maybe they had removed them and put them back on the other way around.
Guess that means I'll have to split the cases again.
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