What the HECK is this cr125 piston? 58mm big bore . . . . .

[Jon K.]

Pulled this out of a 93 CR125. Obviously it is a 57.96mm big bore, but I can find no maker, and none of the numbers come up on a Google search.

Anyone seen this before, or can lend some expertise?

I am stuck.

[Jon K.]

Sorry if this shows up twice, I posted from my phone but I can't find that the post is alive anywhere.

 

Obviously a 57.96mm big bore, but I find no maker, and the numbers do not come up on any Google search that I have tried in an hour and a half.

 

Anyone ever seen such?

 

 

 

 

 

 

Edited January 13, 2016 by Jon K.

[scottydeville]

http://www.amazon.com/Vertex-Piston-57-96mm-Yamaha-2005-2013/dp/B0080JJXK6

[ac717]

How did that bike run as a 144 with the piston? I liked those year cr125s.

[Jon K.]

http://www.amazon.com/Vertex-Piston-57-96mm-Yamaha-2005-2013/dp/B0080JJXK6

   

      Thank you Scotty, that is a bit surprising!  Yamaha .  .  .  .  .

      I promise it is a Honda!

      If I may ask, how did you arrive at that conclusion?  

[Jon K.]

Well, I sent the photos to Vertex, they have confirmed Scotty's identification.

Scotty, you win!

Still do not know what the numbers on top are . . . . and Vertex shoulda been marked with a logo on the bottom.

Got one coming, will confirm in a couple days!

Thanks! Jon

[THUMPERRRR]

your CR has been violated an besmirched by a Yamaha piston,,,

 

oh the humanity...

Edited January 14, 2016 by THUMPERRRR

[jblob]

That is weird it works in a cr, are you stuck using a yz piston now from a previous owner mod or does everything else look right

[Jon K.]

I bought this bike to resell.  Paid $500. I never rode it, but the guy I bought it from roosted up and down the road a few times.  Engine sounded OK, no mains growling, and minimal piston slap.  Suspension and brakes are good.

 

I touched up the frame paint, put new tires on it, new plastic and decals.

 

Compression was a bit low, so popped off the cylinder and found this piston.  Now I have bought a new piston and gaskets.

 

I got $1000 in it now, still do not have it ready to sell.  

 

I ain't gonna make no money .  .  .  .  .  .

 

Good thing I am independently wealthy .  .  .  .  .  . oh wait, I'm not wealthy at all.  ?

[HRC4]

Honda and Yamaha share the same original bore (54mm) and piston pin height, so when they are bored to 144 (58mm) they can share the same piston.. Wossner now makes a universal piston for the 144's

[Turboloader]

That piston's skirt looks really scratched bro, this is prime example for one to clean one's airfilter! Neon Joe agrees!Hemmmlllppp!

[Jon K.]

Just figured an update is in order.

Sure enough, the YZ piston dropped right in. Drilled a couple holes for the bridge and it works great!

Thanks guys!