General; Features - Yamaha SL338D Service Manual

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GENERAL -
Features
CHAPTER 1. GENERAL
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1-1 FEATURES
1. Optimum Engine Perfor111ance
The new, exclusive, five-port cy linder design is being used in this year's model to insure optimum performan·ce. The
five-port syst em innovated by the Y amaha eng ineers has already proven itself in many fields of competition.
2. Increased Engine Reliability and Economy
A s another first in ·th e industry. Yamaha has introduced its already proven Autolube oil injection system in Yamaha
snowmo bile engines. The Autolube system will insure long engine life and also result in a decrease in operational and
maintenance costs.
3. Smooth and Positive Clutch System
Yamaha snowmo biles have an improved automatic centrifugal clutch and power train system. The new clutch allews the
engine to achieve the most usabl e r.p .m .s under all operati ng conditions. The drive ratio will vary from 3.5 :
1 - 1 : 1
thus giving max imum acceleration and clim bing ability.
4. Diaphragm Carburetor
Yamaha snowmo biles have one d iap hragm-type carburetor. These ca rburetors incorporate an internal metering device
which always meters the _correct ai r/ fu el mi xture t o t he engi ne regardl ess of vibration or machine position.
5. Superior Braking
A new design in the track, sprocket , V -bel t and caliper d isc brake has greatly improved the braking efficiency and safety
of the Y amaha snowmobile.
6. Tilt-up Engine Shroud
The attract ive f iberg lass engine sh round has been designed to t ilt-up and away f r om the engine. This functional feature
allows f or engine maintenance.
7. Engine Cowl
The engi ne cow l cove rs the rear of t he engine to protect the driver from the dirt and noise of engine operation. This
cowl is also easi ly removable.
8. Superior Comfort
The suspension system of the main track rid es on individual ly mounted torsion spring bogie wheels. The adjustable
to rsion spr ings of the rear pivot arm of the track, in co mbinat ion with the attract ive and durable seat, assure tireless
co mf ort even on the lo ngest trips.
9. Quick Change
Gears can read ily be shifted into high or low by simp ly operating the quick change lever depending on the conditions of a
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runn 1 ng co urse.
\ The gea r ratio of high positio n sprocket to low position sprocket is
1.6 : 1 .
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