Martin in his 1st lap was flying. For to calculate the Guy Martin's virtual best lap time we have to consider the first sector (Grandstand-Glen Helen) time registered in his lap 2 and the last sector (Cronk Ny Mona-Grandstand) time registered in his lap 2 (that is charged by the braking for the pit stop).
So the Martin's sector times that must be considered to calculate his 2008 TT SBK virtual best lap time are the following:

Grandstand-Glen Helen: 4:18.23 lap 2

Glen Helen-Ballaugh Bridge: 3:07.57 lap 1

Ballaugh-Bridge-Ramsey Hairpin: 3:19.44 lap 1

Ramsey Hairpin-Bungalow: 3:15.13 lap 1

Bungalow-Cronk Ny Mona: 2:16.93 lap 1

Cronk Ny Mona-Grandstand: 1:03.76 lap 2

The sum of those sector times gives 17:21.06 (130.47 mph) i.e. 0.63 seconds better than the official lap record (=17:21.99, McGuinness, 2007 Senior TT lap 2).

Marco - Italia.