Originally Posted by
Glowgeek
Something that happens with all my saitos is that they won't hold peak. They all settle 100-200 rpm down from peak when I adjust them to check peak. It takes a couple of seconds for it to happen after coming off idle and it happens every time. I always start a little rich and work my way to peak. Once peaked it drops rpm and I cannot get it back up there by adjusting the hsn. I have to bring it back to idle and then go full throttle again to see the highest peak again. The lsn has no effect on the phenomenon. Any ideas?
My thought is that its loss of tank pressure that is giving the peak off idle. Throttling up reduces pressure so the HSN leans out just a tad, then steady WOT the pressure equalizes. Just enough to get that 100-200 peak RPM that you just can't get with the needle.