SOHC.co.uk Forums > CB500/550
Cb 550 ss spain
K2-K6:
The right way for the piston, yes.
But the barrels will not be worn at the top or the bottom, the piston rings don't go there when running.
Same as your picture, but 1/2 way into the barrels.
murdock:
In this photo you can now see the piston in the middle of its stroke, between its Upper Dead Center and its Lower Dead Center, the number 1 cylinder (to the left of the direction of travel) and its piston the GAP in the transverse direction is the one that can be seen, 0.10mm, 0.004 inch. ........ and if I try to put the smallest gauge I have in the longitudinal direction 0.04mm, .0015 does not fit
K2-K6:
Very close, but the position of the gauge needs to be 90 degrees from there.
Leave everything as it is in that picture BUT now move the gauge 1/4 around the piston and check there.
murdock:
Ok, from what I understand, instead of placing the gauge at 9 o'clock, I must place it at 12 o'clock, because what I said before, at 12 o'clock the smallest gauge I have does not fit (0.04 mm, .0015 inches)
K2-K6:
Aah, I undersrand now.
That is how they would be machined originally to make the clearance correct. If each piston in it's own barrel has the same measurement, then it looks like it just needs new rings and light hone to build again.
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