Lean out the lsn and keep 2-3% castor. The lsn controls fueling from idle to upwards of 80% throttle. Some, but not all Saitos run very rich in the midrange when the lsn and hsn are set up to what we would call acceptable standards. That is, 250-300 rpm rich of peak and a sustainable idle with snappy transition. If you spend all of your time flying at 0-50% throttle adjust the lsn for cleaner running at those rpms. Once you get it running leaner on the bottom end you may find it wants to cough out and die when slamming the throttle open from idle. If so then slow your throttle servo speed a bit.
Last edited by Glowgeek; 05-16-2021 at 05:53 AM.