They are simlar mechanically to Group 3 with the obvious difference that
they have a bonnet over the front mounted engine
As with group 2 and 3 these require a lot of preparation but can be as fast as Group 3s
with a potential for 40-50 mph.
This is the current development group with many new ideas being tried.
Machines currently being used are:
Westwood Gazelle
Murray
Wheelhorse
