Piston ID

[crackshot]

Honda piston on 85 250R.
Cant find "STD" stamped or size on top of piston.
All I have found is an arrow for front of piston and "CD" stamped.
What does "CD" mean?

[Bryan Raffa]

wiseco piston?

[crackshot]

yes. it is a wiesco. stamped "CD" on top

[Bryan Raffa]

did you clean the whole top off there should be a # on it?????? thats the only place they stamp them. if not mic it.

[Bryan Raffa]

# should be right before cd

[Erics350x]

I've seen em stamped in the bottom inside long ago.

[crackshot]

Yep it's a 66. .
Thanks