Yamaha SL338D - Page 64

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POWER TRAIN - Quick Change E L433B, SW433C, GP433B, EW433C
B. Low Position (In case of SW433C)
With the change knob in ''Low," the dog clutch splined to
the secondary shaft is meshed with gear 1, thereby turning
the gear. As the gear turns, it turns gear 2 splined to the
counter axle on it right end, by which the counter axle is
turned. Gear 3 splined to the left and of the counter axle is
meshed with gear 4, which is designed to turn free around
the secondary shaft. Therefore, as gear 3 begins to turn,
gear 4 is caused to turn. Through gear 4, engine power is
carried
to the drive chain sprocket.
That is, the engine speed is increased from gear 1 ( 19 teeth)
to gear 2 ( 18 teeth) and then reduced from gear 3 ( 14
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teeth) to gear 4 (24 teeth). Accordingly, the gear ratio of
the secondary transmission is :
18 (gear 2) x 24 (gear 4)
19 (gear 1 ) x 14 (gear 3)
After reduced by the quick change the engine RPM is
further reduced from drive chain sprocket ( 14 teeth) to
driven sprocket (25 teeth) at a gear ratio of25 : 14, in the
same manner as in the case of '' High. " Accordingly, the
total reduction ratio is:
~ ~ : ~: (quick change) x 25/14 (Drive c hain sprocket
~ Driven sprocket) = 2.875.
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Gear 2
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Fig. 3-14
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