Adjustments; Check Every 3,000 Miles; Cleaning; Renewing Timing Control Cable - Royal Enfield 350 BULLET 1949 Workshop Maintenance Manual

ROYAL ENFIELD WORKSHOP MANUAL
afterwards with a petrol moistened cloth.
Refit the spring arm and backing spring.
The bent portion of the spring arm must
curve outwards. Place a lock washer over
the fixing screw and tighten.
The main bearings of the Magdynos are
packed with grease during manufacture and
need no attention until a general overhaul is
undertaken.
2 (b). Adjustments

Check every 3,000 miles.

(i) Setting contact breaker gap. The
contact breaker gap must be set to 0.012 in.
- 0.015 in, when the contacts are fully
separated. To adjust the gap, turn the engine
until the contacts are fully opened. Slacken
the locking nut of the adjustable contact and
turn the contact by its hexagon head until a
feeler gauge of appropriate thickness is a
sliding fit in the gap. Tighten the lock nut
and recheck the gap.
(ii) Adjusting the timing control cable.
Any slackness in the cable can be taken up
by sliding the waterproofing rubber shroud
up the cable and turning the hexagon headed
cable adjuster. After adjusting, return
shroud to its original position over the
adjuster and central barrel.
2 (c). Cleaning
To be carried out every 6,000 miles.
Check the contact breaker contacts and, if
necessary, clean them as described in
Subsection 2(a). Wipe the outside of the
magneto to remove dirt or grease. Check the
cable adjuster and control barrel for signs of
water ingress.
Remove the high tension pick-up and
polish with a soft dry cloth. The carbon
brush must move freely in its holder. If
necessary, clean it with a petrol-moistened
cloth. Should the brush be worn to within
1/8 in. of the shoulder it must be renewed.
Whilst the pick-up moulding is removed,
clean the slip ring track and flanges by
holding a soft dry cloth against them with a
suitably shaped piece of wood while the
engine is slowly turned.
The high tension cable must be kept
clean and dry.
2 (d). Renewing High Tension Cable
If, on inspection, the high tension cable
shows signs of deterioration, it must be
replaced, using neoprene covered rubber
cable. To fit a new high tension cable, bare
the end for about 3/8 in., thread the knurled
moulded nut over the cable and thread the
bared cable through tile washer removed
from the old cable (see Fig. 3).
Bend back the strands radially and screw
the nut into the pick-up moulding.
Section G1c Page 2
2 (e). Renewing Timing Control Cable
The Bowden timing control cable should
be renewed if it becomes frayed, otherwise
moisture may enter the contact breaker
housing.
To do this, slip back the rubber shroud
and, by means of the hexagon at the base,
unscrew the control barrel. If the cable and
the plunger to which it is attached are now
pulled upwards, the cable nipple can be
disengaged from the plunger slot.
Soften the solder and remove the nipple.
Thread the new length of cable through
the rubber shroud, cable adjuster, control
barrel, scaling washer and restoring spring.
Solder the nipple to the end of the cable.
Engage the nipple with the slot in the
plunger and screw the control barrel into the
body, ensuring that the sealing washer is
correctly fitted between the barrel and the
body.
Take up any slackness in the cable by
means of the adjuster before refitting the
rubber shroud in position.