SOHC.co.uk Forums > CB500/550

cylinderhead overhaul

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andy_c101:
Yes, oddjob,
I've got a full gasket set, inc the lower gasket & o-rings.
I'm going to take advice on the bore condition ( I think they're ok).
& yes I'm looking into renewing the rings

cheers

UK Pete:
lightly/ hone cylinders and renew rings, then you know its all done properly
Pete

andy_c101:
Pete,
I guess I need to find a local honing m/c shop.
- is there a way of 'breaking the glaze, very very lightly with with v/fine emery cloth ? or is that just plane stupid?

Also whilst the barrels are off, anyone got anytips on how to ease-off the base cylinder gasket? mine is well stuck!
- 3-in-1 oil? hot air gun?.....??

AndyC

UKROBK7:
I bought a Sealey 3-finger hone off ebay for about £10 and adjusted it to give light pressure to break the glaze on my bores.  Be very careful as you can "bell mouth" the bores i.e taper the top and bottom, you can also go too far with removing metal.  Don't let the hone fingers come too far out of the bores, I used a low speed on my variable speed drill and plenty of oil and moved the hone in and out at a steady rate.  Problem was I had to strip the hone and take sharp edges off the mechanism to get it to adjust the pressure correctly (made in China??!!).  I only gave the bores a light hone and was really pleased with the result giving a nice cross hatching to the bores.  I understand a ball hone is better but I found they were expensive for a one off job.

I have used emery cloth in the past on an old british single engine, I wound the emery around a piece of dowel and stuck it in the drill to make a sort of flap wheel.  It worked but I don't know about using it on 4 bores of a precision instrument like our Hondas! :D

If you use an engine m/c shop make sure of the quality of their work.  I used a local shop (who do competition engines) to do some valve seat cutting and they cut the seats wrong and nearly ruined a new set of valves, I'm glad I never used them to hone the bores - I can't imagine how they would have ended up.

Good luck
Rob

Bryanj:
You used to be able to get thingd called Flap Wheels which were a steel spindle with emery cloth on and if you got one a tight fit in the bore that would be ideal as a glaze buster.

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