Page 13 of 144

1-3
1 roll backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.
Always check for obstacles before operating in a
new area.Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.
Always be sure there are no obstacles or people
behind you when you operate in reverse. When
it is safe to proceed in reverse, go slowly.Always use the size and type of tires specified in
this manual.Always maintain proper tire pressure as de-
scribed in this manual.Never modify an ATV through improper installa-
tion or use of accessories.Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
EWB00061Always turn off the engine when refueling.Do not refuel right after the engine has been
running and is still very hot.Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never re-
fuel while smoking, or in the vicinity of
sparks, open flames, or other sources of ig-
U4S262E0.book Page 3 Tuesday, June 10, 2008 11:40 AM
Page 133 of 144
10-1
10
EBU25960
SPECIFICATIONS
Dimensions:Overall length:
1995 mm (78.5 in)
Overall width:
1095 mm (43.1 in)
Overall height:
1120 mm (44.1 in)
Seat height:
830 mm (32.7 in)
Wheelbase:
1235 mm (48.6 in)
Ground clearance:
245 mm (9.6 in)
Minimum turning radius:
3000 mm (118 in)Weight:With oil and fuel:
275.0 kg (606 lb)Noise and vibration level:Noise level (77/311/EEC):
77.6 dB(A)
Vibration on seat (EN1032, ISO5008):
Will not exceed 0.5 m/s²
Vibration on handlebar (EN1032, ISO5008):
Will not exceed 2.5 m/s²Engine:Engine type:
Air cooled 4-stroke, SOHCCylinder arrangement:
Forward-inclined single cylinder
Displacement:
348.0 cm³
Bore × stroke:
83.0 × 64.5 mm (3.27 × 2.54 in)
Compression ratio:
9.20 :1
Starting system:
Electric and recoil starter
Lubrication system:
Wet sump
U4S262E0.book Page 1 Tuesday, June 10, 2008 11:40 AM
Page 134 of 144

10-2
10
Engine oil:Type:
SAE 5W-30 or SAE 10W-30 or SAE 10W-40 or SAE
15W-40 or SAE 20W-40 or SAE 20W-50
Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Engine oil quantity:
Without oil filter cartridge replacement:
2.20 L (2.33 US qt, 1.94 Imp.qt)
With oil filter cartridge replacement:
2.30 L (2.43 US qt, 2.02 Imp.qt)Final gear oil:Type:
Yamaha Friction Modified Shaft Drive Gear Oil
Quantity:
0.50 L (0.53 US qt, 0.44 Imp.qt)
Differential gear oil:Type:
Yamaha Friction Modified Shaft Drive Gear Oil or SAE 80
API GL-4 Hypoid gear oil
Quantity:
0.23 L (0.24 US qt, 0.20 Imp.qt)Air filter:Air filter element:
Wet elementFuel:Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
13.5 L (3.57 US gal, 2.97 Imp.gal)
Fuel reserve amount:
3.3 L (0.87 US gal, 0.73 Imp.gal)Carburetor:Manufacturer:
MIKUNI
Type × quantity:
BSR33 x 1Spark plug (s):Manufacturer/model:
NGK/DR8EA
Spark plug gap:
0.6–0.7 mm (0.024–0.028 in)Clutch:Clutch type:
Wet, centrifugal automatic
-20 -10 0
1020 304050 ˚C
SAE 15W-40
SAE 20W-40SAE 20W-50
SAE 10W-40
SAE 5W-30
SAE 10W-30
U4S262E0.book Page 2 Tuesday, June 10, 2008 11:40 AM