| 1 | 
Lightweight Classic RaceWednesday 30 August 2006 – Mountain Course
- Class B for motorcycles exceeding 175 cc and not exceeding 250 cc.
| Rank | Rider | Team | Speed | Time | | 1 |  Wednesday 30 August 2006 – Mountain Course
- Two-stroke motorcycles exceeding 200 cc and not exceeding 350 cc.
- Four-stroke four-cylinder motorcycles exceeding 450 cc and not exceeding 600 cc.
- Four-stroke twin-cylinder motorcycles exceeding 600 cc and not exceeding 750 cc.
| Rank | Rider | Team | Speed | Time | | 1 |  Friday 1 September 2006 – Mountain Course
| Rank | Rider | Team | Speed | Time | | 1 | 
Senior Manx Grand PrixFriday 1 September 2006 – Mountain Course
- Four-stroke four-cylinder motorcycles exceeding 450 cc and not exceeding 750 cc.
- Four-stroke twin-cylinder motorcycles exceeding 600 cc and not exceeding 1000 cc.
| Rank | Rider | Team | Speed | Time | | 1 | 
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