250 c.c. O.H.V. Twin Cylinder Scooter
fitted with Lucas 5AF Alternator
Cable Colours
Green/Black
Green/Yellow
Green/White
General Description
Designed specially for enclosed engines where fan cooling is necessary, the 5AF alternator consists of a
conventional, RM13 type, wound stator for bolting to the engine crankcase but its RM15 type rotor is
cast integral with the engine flywheel. This has cooling fins cast in its external surface while an inertia
ring is screwed to its periphery. When the engine is fitted with an electric starting motor, a starter ring
gear is substituted for the inertia ring. There is a 6 volt and 12 volt version of this unit. Two
particular applications of the 5AF alternator concerns the 250 c.c. o.h.v. twin cylinder scooters, which
include a de-luxe machine having a starting motor fitted with a starter ring gear. On the standard
machine is fitted a 6 volt 5AF which incorporates an inertia ring, instead of the starter ring gear.
The 6 volt 5AF is rated at 60 watts, whilst the 12 volt unit is rated at 110 watts.
Summary of Contents for TW2
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