SOHC.co.uk Forums > CB500/550
Cb 550 ss spain
murdock:
from left to right 0.10 mm, from top to bottom ???
Bryanj:
You did not listen, the only one that matters is the one at right angles to the wristpin (your smaller number)which seems within limit.
Piston are manufactured oval in the fist place so the measurement along wristpin is irrelevant.
0.04 mm is about 0.0015 thou so within tolerance for re use
If the ring gaps in bore are within tollerance you are good to go
murdock:
I got into this mess because I couldn't get more than 100 psi of compression, so it was just the rings? You think that with honing and new rings I could get at least 60 psi more, changing the primary chain, bearings, shock absorbers, seals it is already decided that I will do it, but I also thought that I should change pistons and rings
Bryanj:
I think probably your compression gauge is not too good and/or the valves are leaking.
Try standing the head on the inlet ports and filling the exhaust ports with petrol to see if the exhaust valves leak then after that turn it over stand it on the exhaust ports and fill the inlets.
In both cases the gasket surface will be vertical with a set of ports on the top
murdock:
Today I did that test with wd 40, not a leak, the exhaust had a lot of carbon, but they did not leak, the intake ones do not leak and they are very clean and the meter is perfect, I have many, I work with hydraulics and pneumatics every day
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version