Royal Enfield 500 TWIN 1949 Workshop Maintenance Manual page 9

ROYAL ENFIELD WORKSHOP MANUAL
common, endless chain from the timing sprocket
on the crankshaft and the tightness of the chain
can be adjusted by means of the chain tensioner
in the timing chest.
The magdyno (or dynamo and distributor) is
driven by a separate endless chain from the rear
camshaft sprocket in the timing chest. The
tension of this chain is adjusted by moving the
magneto fixing bolts in their slotted holes.
Section B1 Page 2
13. Ignition and Lighting System
Lighting and ignition are supplied from a
Lucas magdyno, which consists of a magneto
running at 1/2 engine speed and a dynamo
running at 1.1/3 engine speed.
The rate at which the dynamo charges the
battery is controlled by an automatic regulator
which limits the
approximately 7 volts.
dynamo voltage to