Page 24 of 102
INSTRUMENT AND CONTROL FUNCTIONS
3-9
3
EAU03753
Fuel Make sure that there is sufficient fuel in
the tank. Fill the fuel tank to the bottom
of the filler tube as shown.
EW000130
WARNING
_
Do not overfill the fuel tank, oth-
erwise it may overflow when the
fuel warms up and expands.
Avoid spilling fuel on the hot
engine.
_
EAU00185
CAUTION:_ Immediately wipe off spilled fuel
with a clean, dry, soft cloth, since
fuel may deteriorate painted surfac-
es or plastic parts. _
EAU04284
ECA00104
CAUTION:_ Use only unleaded gasoline. The
use of leaded gasoline will cause se-
vere damage to internal engine
parts, such as the valves and piston
rings, as well as to the exhaust sys-
tem. _
Your Yamaha engine has been de-
signed to use regular unleaded gaso-
line with a research octane number of
91 or higher. If knocking (or pinging)
occurs, use a gasoline of a different
brand or premium unleaded fuel. Use
of unleaded fuel will extend spark plug
life and reduce maintenance costs.
1. Fuel tank filler tube
2. Fuel level
Recommended fuel:
REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity:
Total amount:
21 L
Reserve amount:
4.5 L
U5WME0.book Page 9 Monday, July 29, 2002 10:25 AM
Page 25 of 102
INSTRUMENT AND CONTROL FUNCTIONS
3-10
3
EAU02955
Fuel tank breather hose Before operating the motorcycle:
Check the fuel tank breather hose
connection.
Check the fuel tank breather hose
for cracks or damage, and replace
it if damaged.
Make sure that the end of the fuel
tank breather hose is not blocked,
and clean it if necessary.
EAU00207
Fuel cock The fuel cock supplies fuel from the
tank to the carburetors while also filter-
ing it.
The fuel cock lever positions are ex-
plained as follows and shown in the il-
lustrations.
ON
With the fuel cock lever in this position,
fuel flows to the carburetors when the
engine is running. Turn the fuel cock le-
ver to this position when starting the
engine and riding.RES
This indicates reserve. With the fuel
cock lever in this position, the fuel re-
serve is made available. Quickly turn
the fuel cock lever to this position if you
run out of fuel while riding, otherwise
the engine may stall and will have to be
primed (see “PRI”). After turning the
fuel cock lever to “RES”, refuel as soon
as possible and be sure to turn the fuel
cock lever back to “ON”!
1. Fuel tank breather hose
2. Original position (white mark)
1. Arrow mark positioned over “ON”ON: Normal position
1. Arrow mark positioned over “RES”RES: Reserve position
U5WME0.book Page 10 Monday, July 29, 2002 10:25 AM
Page 91 of 102
SPECIFICATIONS
8-2
8
Air filterDry element
Fuel
Type REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity 21 L
Fuel reserve amount 4.5 L
Carburetor
Manufacturer MIKUNI
Model × quantity BSR37 × 4
Spark plug
Manufacturer/model NGK / DPR8EA-9 or
DENSO / X24EPR-U9
Gap 0.8–0.9 mm
Clutch typeWet, multiple-disc
Transmission
Primary reduction system Spur gear
Primary reduction ratio 1.750
Secondary reduction system Chain drive
Secondary reduction ratio 2.167
Number of drive chain
sprocket teeth (front/rear) 18/39
Transmission type Constant-mesh 5-speed
Operation Left footGear ratio
1st 2.857
2nd 2.000
3rd 1.571
4th 1.292
5th 1.115
Chassis
Frame type Double cradle
Caster angle 25.5 °
Trail 100 mm
Tires
Front
Type Tubeless tire
Size 120/70 ZR17 (58W)
120/70 ZR17 M/C (58W)
Manufacturer/model Dunlop / D220F ST M
Michelin / MACADAM90X E
Rear
Type Tubeless tire
Size 180/55 ZR17 (73W)
180/55 ZR17 M/C (73W)
Manufacturer/model Dunlop / D220 ST M
Michelin / MACADAM90X E
U5WME0.book Page 2 Monday, July 29, 2002 10:25 AM