For the 1968 model year the D14/4 was introduced, similar to the D10 but with greater power again and the 4 speed gearbox fitted across the range. 

 

The D14 engine is equipped with a four speed gearbox operated via a camplate, twin selector forks, a selector quadrant and a selector plate linked to the gear change lever via a spindle. On Bantam engines the clutch is on the right-hand end of the gearbox mainshaft with the primary chaincase also on the right-hand side. The clutch is driven via a chain by the crankshaft sprocket and uses three driven plates and four friction plates. Six springs are used to compress the clutch plates with the clutch pressure plate held in place with the clutch basket via a large circlip.

​

Underneath the clutch basket is a spring loaded kickstart pinion which engages the the clutch via ratchet teeth. The pinion is driven via the kickstart quadrant which is equipped with a return spring. The D14 engine has the contact breaker assembly is located under an access plate in the primary chaincase cover. The D14 engine is fitted with a six-pole Wipac alternator with the rotor keyed into the left-hand end of the crankshaft. The stator is held in place via three studs from the crankcase which also hold the left-hand inner cover in place via nuts. The inner cover also contains the clutch operating mechanism at the rear which is operated via a lever and clutch cable, the latter being slotted into the bottom of the inner cover. The clutch mechanism is adjusted via an inspection hole in the outer left-hand cover. This vehicle is V5 registered.