The B-track turns Turn 5 of the C-track into a tight left-hand hairpin corner which goes uphill at an awkward angle.  This exit of the corner is very difficult to see, and with the angle of the corner means your turn in at Turn 4 needs to be even tighter to get the kart turned into Turn 5.

The B-track then has a small straight and a sweeping left-hander onto the middle straight just after Harris Bends.  It’s possible to hold full throttle around this corner which then heads to Turn 14 of the C-track and presents a nice passing opportunity if the run from the turn is right.