This solo is the original solo from the Racer x album Second Heat. I noticed when I browse the song on youtube that Paul Gilbert never plays the same solo. Part of the answer probably also lyes in the fact that since the two original Racer x studio albums Bruce Bouillet was not a part of either Paul Gilbert´s solo albums or the “new generation” of Racer x albums. But I always loved the original solo and so I wanted to check it out for myself and learn it. I think its the perfect balance between harmony, melody and over the top shredding. Check out the video for more in depth explanation on all the techniques utilized in the solo
Good luck !