Yamaha GP 338F Servise Manual page 56

White/ red
3. White/ black
2. Brown
4. Blue
Fig. 5-11
Notes:
1. Connections must be correct.
To avoid connection errors, couplers are used for
connections of the flywheel magneto, C.D.1. unit and
ignition coil.
Take special care not to make wrong connections
with the ground circuit, ignition coil , lighting circuit.
etc.
2. Magnet removal
To remove the magnets from the flywheel magneto,
use the flywheel magnet puller (special tool).
Never attempt to use a hammer. Damage may
be caused to the magneto or the crankshaft.
3. Use care not to give a shock to the C.D.1. unit.
Should you drop the C.D.1. unit to the ground, inter-
nal parts may be damaged .
(7) Ignition t iming adjustment
1) Install the dial gauge and dial gauge stand #2 in the
plug hole of the cylinder head.
2) Turn the flywheel magneto to bring the piston to top
dead center, and set the dial gauge to zero.
ELECTRICAL SYSTEM
Fig . 5-12
3) Turn the flywheel magnet counter-clockwise, and set
the ignition timing at 0.063 in. (1.6 mm .) B.T .D.C.
This adjustment This adjustment can be done by
turning the pulser. Loosen the two pan head screws
tightening the puler, adjust the pulser so that the
match mark on the flywheel magnet is aligned w ith
timing mark on the pulser.
0 0
0
1. Pan head screw
3 . Alignment mark
2 Tim ing mark
4. Pulser
Fig. 5·13
Note:
1) The difference in the ignition timing between the two
cylinders should be zero.
2) To adjust the ignition timing with the engine being
mounted, remove the tension spring, and then re-
move the exhaust pipe assemblies (R & L), starter
assembly and starter pulley.
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