SOHC.co.uk Forums > CB750

Piston ring size

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yozzer74:
I'm wanting to buy some new piston rings but how do you tell what size they are can't see any marks on pistons to see if there' standard or over size .??

hairygit:
If they are genuine pistons (hm stamped in the little depressd area where the gudgeon pin goes in) and no markings on the crown, they are standard size.

yozzer74:
Thanks I will check that out tomorrow

Bryanj:
Check on the top surface of the rings, no markings mean standard or you see25; 50; 75; 1.00 or something very similar

AshimotoK0:
I have also seen ART marked on OEM pistond and no HM logo. On twins models though.

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