CJ4 Speedtape help

I’m not sure what I’m doing wrong- When flying the working title CJ4 I get the overspeed alert and the tape is showing red down to 235 knots- even when I’m at 40000 ft. I have cruise altitude set but no sequenced waypoint alts except for sid/star. Thanks

Above FL280 you have to consider Mach instead of IAS, and the airspeed limit for the CJ4 is M 0.77.

This checklist has a section for the speed limits at the end: WT CJ4 Checklist - Google Docs

Dirk

Thank you.