Kurt,

That's too bad about your Saito. I had trouble with a sticky valve when mine was fairly new. I had run several tanks through it before it suddendly quit starting. One of the engine wizards at the field tore into it and found a bur on the inside of one of the sleeves that the push rod slides in. He scrounged around and found a drill bit that fit exactly and used the bit to debur the sleeve. Worked like a charm.

Have no idea if you have a similar problem, just wanted to share that experience.

jon