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60
IV. ENGINE
Removal
1. Remove the A-C generator. (See page 54.)
2. Remove the bolt and take out the starting sprocket
retaining plate.
3. Remove the starting chain together with the sprockets.
4. Loosen off the 6mm bolts attaching the starting motor to
the crankcase; remove the starting motor.
5. Disconnect the starting motor cable from the motor.
6. Loosen off the gear cover screws and remove the cover.
Fig. 4-126
Inspection
l. Checking the carbon brushes
Check the brushes and springs far condition. Brushes that
afe worn or pitted badiy should be replaced with a new
ones. Discard the springs if they afe weak so that the
brushes afe unable to rest on the commutator.
Standard carbon brush length:
11-12.5mm
(0.433-0.492-in.)
Service limit: 5mm (G020-in.)
Standard spring tension: 0.495-0.605
kg (17.46-21.34
ozs.)
Service limit: 0.495 kg (17.46 ozs.)
2. Cleaning COn1n1utator
Sand off alI burrs, copper dust or any other foreign
particles with a fine en1ery cloth. Wipe it clean before
installation.
3. Checking field coil far continuity
Check far continuity between the brushes connected to the
field coil and starting n1otor cable. If there is no continuity,
it is a reliable indication that the field coil has an
open-circui t.
Fig. 4-128
Checking stator coi!
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