2002 YAMAHA YFM660R fuel reserve

4-29 1. Fuel tank cap
1. Bouchon du réservoir de carburant
1. Tapón del depósito de combustible
EBU00092
Fuel tank cap
Remove the fuel tank cap by turning it counter-
clockwise.
EBU00093
Fuel cock
The fuel cock supplies fuel from the fuel tank to the
carburetor.
The fuel cock has three positions.
OFF: With the lever in this position fuel will not
flow. Always turn the lever to this position
when the engine is not running.
ON: With the lever in this position, fuel flows to
the carburetor. Normal riding is done with
the lever in this position.
RES: This indicates reserve. If you run out of fuel
while riding, turn the lever to this position.
THEN FILL THE FUEL TANK AT THE
FIRST OPPORTUNITY. After refuelling, re-
turn the fuel cock lever to the “ON” position.
U5LP61.book Page 29 Monday, August 27, 2001 3:49 PM

5-9
EBU00998*
Fuel
Make sure there is sufficient gasoline in the tank.NOTE:_ If knocking or pinging occurs, use a different brand
of gasoline or higher octane grade. _CAUTION:_ Use only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and piston
rings, as well as to the exhaust system. _
Recommended fuel:
For Europe: Regular unleaded gasoline only
with a research octane number of 91 or
higher.
Fuel tank capacity:
Total:
12 L
Reserve:
2.6 L
U5LP61.book Page 9 Monday, August 27, 2001 3:49 PM

10-3
Radiator capacity (including all routes) 1.3 L
Air filter Wet element
Fuel:
Type
Tank capacity
Reserve amountRegular unleaded gasoline only
12 L
2.6 L
Carburetor:
Type
× quantity
ManufacturerBSR33
× 2
MIKUNI
Spark plug:
Type/manufacturer
GapDPR8EA-9/NGK
0.8 ~ 0.9 mm
Clutch:
Type
OperationWet, multiple-disc
Left hand operation
Transmission:
Primary Reduction System
Primary Reduction Ratio
Secondary Reduction System
Secondary Reduction Ratio
Transmission type
OperationSpur gear
71/34 (2.088)
Chain drive
40/13 (3.076)
Constant mesh, 5-speed forward, 1-speed reverse
Left foot operation MODEL YFM660R
U5LP61.book Page 3 Monday, August 27, 2001 3:49 PM