pistons

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Hi:
Just bought a new complete 850 engine I'm going to rebuild this summer.

When I've taken the head off, I've seen the piston heads stamped with a B and "std" on each one's outer side.
Does anybody know what kind are these?
They look perfect and the barrells too, but if they're not good quality pistons, I'll discard them right away.

Thanks!
 

L.A.B.

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sparkplug said:
Hi:
Just bought a new complete 850 engine I'm going to rebuild this summer.

I've seen the piston heads stamped with a B and "std" on each one's outer side.
Does anybody know what kind are these?

They could be the original pistons.
You would need to remove them and check for any manufacturer's markings (AE?) or numbers on the undersides of the pistons?
 
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Hi, Les:

I'll be able to dismantle the engine in a couple weeks. I'll post the results in case there's any other references on the pistons.

Thanks for you help!
 
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