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1976 CB550F1 (what have I let myself in for) Project

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SteveD CB500K0:
I was wrong anyway

It’s a Z in a 0




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eight0:
Got the pistons on. Is there a desired order of piston ring gaps in terms of orientation?

And before anyone says I have the pistons in the wrong order.. the machinist couldn't work out which was the front of the block so labelled them back to front.

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eight0:
Thanks Ken. No, not genuine, they are from DS. I do regret not spending a bit more on the pistons. I got the machinist to bore all to 0.25 over and as a last minute thought when I went to collect it gave him a piston to check all was good.
It was out by a 'few thou' apparently. I gave him all four pistons and none of them fit. Luckily they were all larger than they should be so he was able to save it and re-bore each cylinder to match each piston and did it without charge.

eight0:
I just got the barrels on, but it was really tough to get it on. Pistons 2 and 3 go in fine, then the outer ones really seem to seaze it up. I had to really tapp it down with some wood but I cannot turn it over and have all 4 pistons move, the middle two do but the outer ones seem stuck. Should they be that stiff?

I took it off after the first time because I was worried I was jamming a ring into the wall, but everything looked fine.

I guess when I bolt the head on and am able to use more force they would move.

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mickwinf:
there is something wrong if it wont turn over easily, has the cam chain jammed at the crank end? you would have to hold it up and make sure it is on the teeth on the crank.

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