23' CC Performance

[Viking35]

I recently bought a 23' CC, 1984, with a 250 Yamaha HDPI (2003), it has a 17' stainless prop. She cruises about 22.5 - 23 knots at 4000 RPM. Haven't opened it up yet, but thought that she would be a bit faster at this RPM. Is this speed about right for 4000 RPM based on how she's powered? She also has a T-top with a glass top.

So far I like the way she rides just need a bit more time to get out and run her, put her through the paces. Appreciate any comments.