CRM250 ARW piston woes

Does anybody in the group have any experience with Honda CRM250, they
are a grey import with Honda MPE compliance plate, 1998 model approx
My problem is getting replacement piston, the dealers (honda) tell me
there is a mark on the barrel ,(A,B or C) trouble is the dealers can't
find said mark when shown barrel, and therefore won't order a piston, I
have figured out (from Wiseco catalouge) that the piston is the same as
a "normal" CR250 bore stroke and internal wrist pin dia, but the
little end bearing is a 23mm OS dia (in the CRM) instead of the 22mm os
dia in the standard CR, SOOOOOO, am I right in just ordering the correct
top bearing (23 mm OS dia) and going with the installation, what have I
missed.

Mick Chester
Cootamundra

 

You tried www.bikebandit.com for OEM or aftermarket parts? They ship intl,
it's a few bucks, but if you get some other goodies at the same time it
might be worth a crack. US based.

Cam

 

That'll be an exact size for the barrel ... if you get the wrong piston
for the job it won't fit properly. If you can find out what the A, B, C
sizes are, you could measure exactly and buy the right piston ...
workshop manual time, I'm afraid.

-----sharks