SOHC.co.uk Forums > CB500/550
CB550K - engine rebuild (partial or full)
K2-K6:
"With great weather over last days, I started to consider changing strategy - just fix valve cover, cam and rocker issue and keep riding bike this seson as is. Rebuild (partial or full) can be done next winter."
I can't see any problem with that. With the rocker fixed it should be fine and you'll just be planning an "advanced" service to change primary chain etc when it's convenient for you.
Oil pressure, can you temporarily install one of the car type gauge into the pressure switch port? Then you can measure it when it's fully warmed and running throughout rev range.
Erny:
I'll look for some gauge.
What level of pressure is minimum needed or which level is "good" enough?
K2-K6:
A loose description, but think the oil light switch extinguishes at about 15psi, maximum about 60psi at full speed (will open pressure relief valve cold when revved so you'd not see more than 60) likely to run in range of 30 to 60 psi when hot.
Erny:
Thanks
One more question - can I consider replacing vavlve seals w/o removing head? I guess it is doable but maybe difficult and special tool to support valves from bottom needed?
Charlie J:
I used a Sealey VS1542 Valve Collet Remover/Installer to remove the valve springs so I could replace the oil seals without removing the cylinder head. I was a bit apprehensive about using it as I had read some reviews that said the tool was fine for removing the collets but not so good at reinstalling them. However, the tool worked a treat for me. The only slightly tricky part was dealing with the exhaust valves on cylinders 2&3 because of the proximity of the posts for the fuel tank mounting rubbers. But a sharp tap, square on with a 2lb hammer did the trick. I also used the string down the plug hole and rubber band tricks which I read about on this forum.
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