Royal Enfield G Workshop Maintenance Manual page 40

ROYAL ENFIELD 350cc and 500cc O.H.V. WORKSHOP MANUAL
dirt and moisture from the top of the battery and
ensure that the connections are clean and tight.
4. Servicing
If the battery is subjected to long periods of
night parking with the lights on, without suitable
opportunities for recharging, a low state of
charge is to be expected.
Measure the specific gravity of the acid of
each cell in turn with a hydrometer (see Fig. 3).
Page 40
The following table shows the state of charge
at different values of specific gravities
If the battery is discharged, it must be
recharged, either on the motor cycle by a period
of daytime running or from an external D.C.
supply at the normal recharge rate of 1.5 amp.