Brian,
Chook chasers v BSA's
Chook chasers:
Go faster
use more fuel,
Vibrate just as much (or more)
Lighter
Better on gravel roads
Similar brakes
same reliability (very good)
Harder to get parts
dearer for the parts you CAN get
Don't sound as good
can break your leg on a kickback!
Pull fewer chicks
Like the A10's, everyone had one (or their dad, or their mate!)
Richard