Harry, I ordered an APC 15x8 for the Saito 1.25, it should be here by Thursday and I'll give you the numbers. I eased another 1.20 rpm out of it by re-setting the valve lash back to the Saito recommended .004. The exhaust had an intermittent lean sounding crackle to it, even when set too rich, I suspected the .002 valve setting was the culprit and I was correct.