Originally this was a copy of the DKW RT125, then developed further by
BSA.
D1 1948-63, 125cc, 2 stroke single, 50mph!!
Single saddle, rigid rear and telescopic
forks. This had a plunger rear end on later models. It was a unit single engine
with a 3 speed gear box.
D3 1958-61, 150cc, 2 stroke single, 60mph!!!
Rare machine
this, being a bored out version of the 125cc with improved front forks and
brake. The later model has a swing arm frame. It also had an improved
lubrication system, which means it is less prone to seizures.
D5/D7/D10 1958-68, 175cc, 2 stroke single, 65/70mph !!
The D7 had the
benefit of a better frame, forks and guards. The engines a bored out version of
the previous model. The D10 had a relatively modern chassis with a much more
improved bakes and suspension.
D14/175 1968-72, 175cc, 2 stroke single, 75mph!!!
The D14/4 was
the best Bantam. The D14/4 had a 4 speed gear box. Most of the problems had by
now been ironed out, this is a nice bike with better handling and reliability.