does anyone know where I can find a piston ring for my OS.40-H. I have found new bearings, but need anew ring that subsequently
broke during the process of removeal. thanks, Greg S

Frank Bowman rings. I am certain he will have the ring you need and he has very fair prices.

Better yet here is a link to a page that shows the rings he makes and the email to reach him. His list does show a ring for your engine. I just ordered a new ring from him the other day for a O.S 46sf. I had it in just a few day.
http://www.rcuniverse.com/forum/m_9107979/printable.htm

Thanks for the info. I just sent an e-mail off to Frank

where did you find the bearing?

Boca bearing has the bearings, Frank Bowman turned me on to them (www.Bocabearings.com). I went on thier site, and sure enough
they had them.

Yea....Boca is good service. RC Bearings is also good as well. Can't go wrong ordering from either.