engine YAMAHA YFM700R 2006 Repair Manual

8-69
EBU03070
Throttle lever adjustment
NOTE:
Adjust the engine idling speed before adjusting
the throttle lever free play.
1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle
lever free play is 2–4 mm.
3. Tighten the locknut.
1. Locknut 2. Adjusting bolt a. Free play1. Contre-écrou 2. Boulon de réglage a. Jeu1. Contratuerca 2. Perno de ajuste a. Juego libre
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8-93
EBU15752
Adjusting the drive chain slack
1. Loosen the rear axle pinch bolts.
2. Insert a rod of a diameter of 8 mm and a
length of 10 cm into one of the holes in the
drive chain tensioner as shown.
3. Shift the transmission into the neutral posi-
tion.
4. To loosen the drive chain, push the ATV
forward, and to tighten the drive chain,
push the ATV backward.
cC
Improper drive chain slack will overload the
engine as well as other vital parts of the ATV
and can lead to chain slippage or breakage.
To prevent this from occurring, keep the
drive chain slack within the specified limits.
4
2
11
3
1. Rear axle pinch bolt (×4) 2. Rod
3. Drive chain tensioner 4. Hole (×3)
1. Boulon de pincement de 2. Tige
l’essieu arrière
3.
Tendeur de chaîne de transmission4. Orifice (×3)1.Perno de sujeción del eje trasero2. Barra
3. Tensor de la cadena de 4. Orificio (×3)
transmisión
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8-99
2. Wipe the drive chain dry.
3. Thoroughly lubricate the drive chain with a
special O-ring chain lubricant.
cC
Do not use engine oil or any other lubricants
for the drive chain, as they may contain sub-
stances that could damage the O-rings.
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8-101
EBU05700
Cable inspection and lubrication
w
Inspect cables frequently and replace if dam-
aged. Corrosion can result when the outer
covering of control cables becomes dam-
aged. Cables can also become frayed or
kinked. Operation of controls could be
restricted, which could cause an accident or
injury.
Lubricate the inner cables and the cable ends. If
the cables do not operate smoothly, ask a
Yamaha dealer to replace them.
Recommended lubricant:
Engine oil
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8-137
EBU15871
Troubleshooting charts
Starting problems or poor engine performance
1. Fuel
Check the fuel
level in the fuel
tank.
2. Compression
Use the electric
starter to see if there
is compression
3. Ignition
Remove the spark plug
and check the electrodes.
WetWipe clean with
dry cloth
DryAttach spark plug cap
and ground to chassis.Use the electric
starterSpark weak
Spark goodIgnition system normal
No spark
Ask a Yamaha dealer to inspect
Adjust the spark plug gap
or replace the spark plug.
There is compressonCompression normal
Ask a Yamaha dealer to inspectNo compression
There is enough fuel.Check the compression.
Supply fuel.There is no fuel.The engine does not start.
Check the compression.
4. Battery
Use the electric
starter
Engine turns over
quickly.Battery is good.
Check the connections.Engine turns over
slowly
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8-138
Engine overheating
NOTE:
If it is difficult to get the recommended coolant, tap water can be temporarily used, provided that it is
changed to the recommended coolant as soon as possible.
w
Wait for the engine and radiator to cool before removing the radiator cap. You could be burned
by hot fluid and steam blown out under pressure. Always put a thick rag over the cap when
opening. Allow any remaining pressure to escape before completely removing the cap.
Wait until the
engine has cooled.Check the coolant level in the
reservoir tank and/or radiator.
Level is OK.
Level is low, check the
cooling system for leakage.
No
leakage.
Leakage.Ask a Yamaha dealer
to inspect and repair
the cooling system.
Add coolant.
(See NOTE.)
Restart the engine. If the engine overheats
again, ask a Yamaha dealer to inspect and/or
repair the cooling system.
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9-1
EBU04180
CLEANING AND STORAGE
A. CLEANING
Frequent, thorough cleaning of your machine
will not only enhance its appearance but will
improve its general performance and extend the
useful life of many components.
1. Before cleaning the machine:
a. Block off the end of the exhaust pipe to
prevent water entry. A plastic bag and
strong rubber band may be used.
b. Make sure the spark plug and all filler caps
are properly installed.
2. If the engine case is excessively greasy,
apply degreaser with a paint brush. Do not
apply degreaser to the chain, sprockets or
wheel axles.
3. Rinse the dirt and degreaser off with a gar-
den hose. Use only enough pressure to do
the job.
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9-5
8. Automotive type wax may be applied to all
painted and chrome plated surfaces.
Avoid combination cleaner-waxes. Many
contain abrasives which may mar the paint
or protective finish.
When finished, start the engine and let it
idle for several minutes.
w
Wet brakes may have reduced stopping abili-
ty, increasing the chance of an accident.
Test the brakes after washing. Apply the
brakes several times at slow speeds to let
friction dry out the linings.
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9-7
EBU05260
B. STORAGE
Long term storage (60 days or more) of your
machine will require some preventive proce-
dures to guard against deterioration. After thor-
oughly cleaning the machine, prepare for stor-
age as follows:
1. Fill the fuel tank with fresh fuel and add
fuel stabilizer (if available).
NOTE:
Use of fuel stabilizer eliminates the need to
drain the fuel system. Consult a Yamaha dealer
if the fuel system is to be drained instead.
2. Remove the spark plug, pour about one
tablespoon of SAE 10W30 or 20W40
motor oil in the spark plug hole and rein-
stall the spark plug. Ground the spark plug
wire and turn the engine over several times
to coat the cylinder wall with oil.
3. Clean the drive chain thoroughly and lubri-
cate it. (See page 8-97.)
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10-1
Model YFM700R
Dimension:
Overall length 1.845 mm
Overall width 1.170 mm
Overall height 1.130 mm
Seat height 815 mm
Wheel base 1.280 mm
Ground clearance 240 mm
Minimum turning radius: 3.500 mm
Basic weight:
With oil and full fuel tank 192 kg
Engine:
Type Liquid cooled, 4-stroke, SOHC
Cylinder arrangement Forward-inclined single cylinder
Displacement 686.0cm
3
Bore ×Stroke 102.0 ×84.0 mm
Compression ratio 9.20 : 1
Starting system Electric starter
Lubrication system Dry sump
EBU04280
SPECIFICATIONS
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