Yamaha SL338D - Page 82

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ENGINE MAINTENANCE - Ignition Timing
e. With the piston at top dead center, rotate the
crankshaft backwards until the dial indicator reads 1.8
mm before top dead center.
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Fig. 7-5
f. Adjust th e points by lo ose nin g tl1 e po int sec ur ing
sc rew s and moving th e po int adjust me nt wi t h a slo tt ed
screwdriver. Set th e adjus tment so that th e po ints are
just opening at 1.8 mm BTDC .
\ \ .
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Fig. 7-6
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g. Tighten the securing sc rews and recheck the ti ming.
h. Repeat the above
pr oc ed ure for the lef t-hand cyli.nder
and left-hand
se t of po int s. The left -h and primary
igniti on wire is or ange in colo r .
i. There is on ly one
poin t adjustme nt on the AC magneto
wh en the timin g has been adjusted co rr ectly the po int
ga p wil l also be co rr ect.
When
th e mark on the flywhee l magneto al igns with
e ach of bo th r ig ht and l eft timing mar ks on the sta tor,
the p
is ton h ea ds are positioned 1. 8 mm BTDC,
respec
tiv el y.
When the mark on the fly wheel m ag neto aligns with the
po int er on the d inamo stat or, a spark takes place (wi th the
advanced i
gnit i on t imi ng).
Mark ©
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Fi g. 7-7
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