CB500 +3mm Big Bore Kit Question

smarsh

Been Around the Block
Hey all

Just bought a NOS CB500 +3mm kit to put in my stock CB550K, after DTT member Tim was able to point in this direction, thanks Tim.

I had a couple of questions about the rings in the kit. The kit came with a 1 piece oil ring. Anyone have any thoughts or experience using these? Should I try and source 3 piece oil rings instead?

Also I was wondering if anyone could confirm the correct installation for the rings. Its obvious as to where the oil ring goes, but wanted to make sure where the other two rings are meant to go. I read on another thread that the stamped marking dictate the "up" side, and that the one marked STD 3 is the second ring. Anyone?

One of the top two rings and the oil ring are stamped "3".
ScreenShot2014-05-16at13243pm_zps04b8a01c.png


The other ring is stamped "STD 3", and one side has a bevel.
ScreenShot2014-05-16at13506pm_zps1bb221a6.png
 
The marks on rings typically face 'up' and so does the beveled edge of a ring, which seems consistent. The beveled ring I believe should be the middle ring. The squared ring is the compression ring.
 
Thanks for the input guys :)

The marking on the scraper ring is on the opposite side to the bevel, which I surmise would mean the bevel side should go downwards. That seems to be consistent with another thread I have seen.

Cheers
 
Tim said:
The marks on rings typically face 'up' and so does the beveled edge of a ring, which seems consistent. The beveled ring I believe should be the middle ring. The squared ring is the compression ring.

Nope, thats secondary oil ring, 'cut away' goes down
There are pictures of correct installation in service manual (Almost all the genuine Honda service manuals use same pic)
This is CB360, can't find the 550 pic.

Ringfitting.png
 
crazypj said:
Nope, thats secondary oil ring, 'cut away' goes down
There are pictures of correct installation in service manual (Almost all the genuine Honda service manuals use same pic)
This is CB360, can't find the 550 pic.

Ringfitting.png

Thanks PJ. Yep, the drawing I have in my 550 Clymer manual is the same as the 360. The bit confusing me was that the picture shows the installation having the slope of the bevel facing upwards, yet the stamping on the ring would dictate having it installed the other way around, as the stamping is on the opposite side ( if the stamping always faces upwards)
 
Numbers or letters are always the top face.
You wouldn't believe how many times I've seen rings fitted wrong, even by 'professional mechanics'
In the automotive world there is a stepped ring called a 'ridge dodger' where the step goes upwards, when your not bike specific, the genuine ring gets fitted in the wrong place ::)
 
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