While we're on the topic of rings...I'm sure this is addressed somewhere else, but I couldn't find it...What is the proper cylinder treatment when replacing a ring? I've built plenty of car and bike motors but I'm not sure how that experience translates to RC motors, even if I could find a hone to fit the small bore. Also I'm not sure that an agressive honning would would be very good for an AAC cyl. I do know not to use anything more than a clean pencil eraser on the valves/seats in the Saito AAC cyls, but not anything on cyl prep/honing/deglazing.

I've got a Saito 90R3 that seems to have low comp on one cyl. should I replace just the one ring or all of them and start all over on the break-in? This is a very lightly used motor, new to me that flames out consistantly on the same cyl. New H9 super-plugs and lash adjusted all 'round. Omega 15% castor/synth.

Thanks!