Cb 550 ss spain

[Erny]

If I can ask - where did you buy that tool?

I'll be working on my engine probably next winter so I want to prepare myself

[Bryanj]

That may take too much metal off. I am at work so when i get home i will look at ebay to get a pic of what you need

[murdock]

ok, I await your answer, I am curious, other times I have done it with this tool, it has a nut that tightens the spring to regulate the pressure it exerts on the barrel, it can be very soft at low revs

[Bryanj]

Look at ebay item 184430930041 you would need a 60mm one. The tool you have will actually remove metal and make the clearance bigger the one i link to will just remove the glaze on the bore allowing new rings to seal better.
Honda rings are best but dearest as well.
I have some of those flap wheels here but not sure of postage cost to you

[murdock]

ok, it is a good excuse to replace the ones I have that are already kaput, what grain do you advise me? 120? I imagine that a very fine pass with oil

[Bryanj]

No oil just a pass through and very good wash off afterwards

[murdock]

I have it

[Bryanj]

Maybe i'm too cautious but a proper hone can take several thou out and as the piston/bore clearance is very tight plus reusing old pistons its just me thinking it might take too much whereas the flapwheel will simply remove glaze, i used to rebuild essex, kent and pinto engines very regularly for a lead footed mate and only ever used the "glaze busters" about at the time which were basicaly long shanked flap wheels

[murdock]

the few times that I have changed rings I have used a 3-legged grinding wheel like the one in the photo and I have gently scratched the surface with oil, I will see how it looks with the dry-mounted sandpaper, I have taken the precaution of buying a finer grit (150 ) I'll show you how it looks, I haven't bought the rings yet, I don't know whether to buy the 4 INTO 1 or the IMD ones, they are made of different materials

https://www.ebay.de/itm/Reproduction-Piston-Ring-Set-of-4-Standard-13011-374-000-Honda-CB550/172685809641?hash=item2834e057e9:g:ebcAAOSwPh5ZIHKB

https://www.ebay.de/itm/163318063827?mkevt=1&mkcid=1&mkrid=707-53477-19255-0&campid=5338722076&toolid=10001

[murdock]

anyone has experience with any of these rings?

[Trigger]

It doesn't matter what rings you use, if the piston to bore clearance is out of spec, the engine will smoke  And if you have honed it, it will be out and new rings would not work .

[McCabe-Thiele (Ted)]

If I can ask - where did you buy that tool?

I'll be working on my engine probably next winter so I want to prepare myself

I used a tool like that in the late 1970's on an A series engine - the bores were brilliant afterwards - trouble was it would only tow start afterwards so had to take the engine out again to getr it rebored! Never touched  a glaze breaker since!

[royhall]

My GS1000 top end was "rebuilt" by that toss*r so called mechanic at RapSuberbikes. They re-honed the bores and fitted new rings, lasted 600 miles before it was smoking badly. On measuring the bore to piston clearance was over 7 thou, that's about four times as much as it should be. Gentle deglaze by hand with some oil on 1200 grit wet and dry at the most. Then check the sizes are in spec before rebuilding or you will be doing it again.

[Bryanj]

Thats why i suggested the flapwheel, its same as using wet n dry

[murdock]

well, ok, they have convinced me, I will change the whole kit, pistons and rings, at first that was the idea, leave the engine as best as possible within my possibilities. I love that motorcycle since I was 8 years old, the older brothers of My friends had some and I died of envy, so when I could after many years I got one, it is very fast and docile for traffic and small walks, I use it to go to work.
well, now determine how much will go up?
0.25 or more? What improvements can I make above to improve performance without changing barrels? I'm talking about jobs that can be done at home, when I find someone to enlarge my barrels, what tolerance should be respected?

thank you very much for your help