Yamaha VK540V Owner's Manual page 72

E. Engine constantly backfires or misfires
1. Faulty spark plugs ... Replace the
spark plugs.
2. Clogged fuel system ... See A.1. above.
3. Malfunctioning T.O.R.S. system ... See
A.2. above.
F. Snowmobile does not move
1. Malfunctioning V-belt clutch ... Ask a
Yamaha dealer to inspect.
2. Drive track does not move ... Foreign
object is caught in the drive track, or
the slide runners have melted to the
slide metal due to lack of lubrication.
3. Tight, loose, or broken drive chain ...
Ask a Yamaha dealer to inspect.
G. V-belt twists
1. Improper V-belt ... Replace with the
correct V-belt.
2. Incorrect V-belt clutch offset ... Ask a
Yamaha dealer to inspect.
3. Loose or broken engine mount ... Ask a
Yamaha dealer to inspect.
H. V-belt slips or burns
1. Oily or dirty V-belt or primary and sec-
ondary sheave assembly surfaces ...
Clean.
2. Problem with the driveline ... See G
above.
I. Engine does not upshift or downshift
properly or engages harshly
1. Worn or damaged V-belt ... Replace
the V-belt or ask a Yamaha dealer to
inspect.
2. Incorrect V-belt clutch settings for alti-
tude or conditions ... Ask a Yamaha
dealer to inspect.
3. Worn or sticking
assembly ... Ask a Yamaha dealer to
inspect.
primary sheave
9-2
4. Worn or sticking secondary sheave
assembly ... Ask a Yamaha dealer to
inspect.
J. Noise or excessive vibration in drive
chain and sprockets
1. Broken V-belt clutch components ...
Ask a Yamaha dealer to inspect.
2. Worn or damaged bearings ... Ask a
Yamaha dealer to inspect.
3. Worn or damaged V-belt with flat spots
... Replace.
4. Worn or damaged idler wheels or
shafts ... Ask a Yamaha dealer to
inspect.
5. Worn or damaged drive track ... Ask a
Yamaha dealer to inspect.