1975 cb125s piston ring placement?

m25pa · L Plate Warrior Joined: 26 Dec 2009 Karma :

hello ,
this being my first post id like to thanks to all here my dad and i have a little problem we bought a basket case were just about ready to finish the motor rebuild when we hit a brick wall ...
how do the piston rings go on?
the ring set we bought dont have any directions!
anybody have a diagram
thanks,
Ron

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Is this serious?

There is a groove in the piston, the ring goes in the groove like a circlip.

Hardly a brick wall Laughing

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m25pa · L Plate Warrior Joined: 26 Dec 2009 Karma :

no if were that easy i would have been up and running today
the top two rings are different the one ring has a step and the other is beveled all the manuals i looked at say to put the mark up the aftermarket kit i got dont have the mark so whats the answer?
ive worked on tecumseh motors before so i have SOME idea of what i doing

evoboy · World Chat Champion Joined: 20 Aug 2009 Karma :

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

. · Renault 5 Driver Joined: 18 Feb 2008 Karma :

If only one of the rings has a chrome finish , that will always be the top one.
If either ring has the word 'top' etched into it, that is the way it is fitted, not where it is fitted.

The stepped ring will be the lower compression ring and the step will face downwards towards the oil ring.

Examine the top ring. The INSIDE edge should have an angle cut into one face only. On the top ring this chamfer will face upwards. The chamfer is usually present on both bevelled and unbevelled rings (where the bevel is on the outside).

If there is no inside edge chamfer, then use the stepped ring as your guide in positioning the top ring. It will have one side cleaner than the other, position the top ring in the same way, ie if the top side of the secondary ring is the cleaner one, then fit the cleaner side of the primary compression ring facing the same way when on the piston.

m25pa · L Plate Warrior Joined: 26 Dec 2009 Karma :

thanks all for the help! next time ill just stick with honda parts!