Yamaha Venture Lite PZ50RTB Owner's Manual page 86

Troubleshooting
Seized engine: Seizure is caused by poor
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lubrication, inadequate fuel, or an air leak.
Ask a Yamaha dealer to check.
Engine power is low
Low coolant temperature indicator light is
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flashing: Warm engine up.
Faulty spark plugs: Clean or replace spark
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plugs.
Improper fuel flow: See "Fuel system"
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above.
Incorrect V-belt clutch settings for altitude
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or conditions: Ask a Yamaha dealer to
check.
Engine constantly backfires or mis-
fires
Faulty spark plugs: Replace spark plugs.
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Clogged fuel system: See "Fuel system"
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above.
Malfunctioning T.O.R.S.: See "Electrical
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system" above.
Engine overheats
Insufficient coolant: Add coolant.
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Air in cooling system: Bleed cooling system
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or ask a Yamaha dealer to check.
Leaking coolant: Ask a Yamaha dealer to
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check.
Snowmobile does not move
Malfunctioning V-belt clutch: Ask a Yamaha
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dealer to check.
Drive track does not move: Foreign object is
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caught in drive track, or slide runners have
melted to slide metal due to lack of lubrica-
tion.
Tight, loose, or broken drive chain: Ask a
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Yamaha dealer to check.
V-belt twists
Improper V-belt: Replace with correct V-
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belt.
Incorrect V-belt clutch offset: Ask a Yamaha
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dealer to check.
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Loose or broken engine mount(s): Ask a
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Yamaha dealer to check.
V-belt slips or becomes extremely hot
Oily or dirty V-belt or primary and second-
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ary sheave assembly surfaces: Clean.
Problem with driveline: See "V-belt twists"
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above.
Engine does not upshift or downshift
properly or engages harshly
Worn or damaged V-belt: Replace V-belt or
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ask a Yamaha dealer to check.
Incorrect V-belt clutch settings for altitude
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or conditions: Ask a Yamaha dealer to
check.
Worn or sticking primary sheave assembly:
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Ask a Yamaha dealer to check.
Worn or sticking secondary sheave assem-
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bly: Ask a Yamaha dealer to check.
Noise or excessive vibration in drive
chain and sprockets
Broken V-belt clutch components: Ask a
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Yamaha dealer to check.
Worn or damaged bearings: Ask a Yamaha
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dealer to check.
Worn or damaged V-belt with flat spots: Re-
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place.
Worn or damaged idler wheels or shafts:
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Ask a Yamaha dealer to check.
Worn or damaged drive track: Ask a
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Yamaha dealer to check.