Mike, one other thing, is the crankcase vent nipple dumped thru a short piece of large fuel tubing? Some Saito's seem to be very touchy concerning the amount of back pressure they will tolerate in the crankcase. This could be very true in the case with a newer engine, a little rich, generating a lot of oil in the crankcase and it might be coming out in a big gulp which would block off the breather tube for a short while. Have not seen this cause one to go dead yet, but I have seen it cause the engine to fall on its face performance wise.

Ed M.