INSTRUMENT AND CONTROL FUNCTIONS
3-8
3
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.
EAU04484
Fuel cock This motorcycle is equipped with a
negative pressure fuel cock. The fuel
cock supplies fuel from the tank to the
carburetor while also filtering 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 carburetor 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”! Recommended fuel:
REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity:
Total amount:
11 L
Reserve amount:
3.4 L1. Pointed end positioned over “ON”ON: Normal position
1. Pointed end positioned over “RES”RES: Reserve position
E_5kr.book Page 8 Friday, December 14, 2001 11:33 AM
SPECIFICATIONS
8-2
8
Air filterDry element
Fuel
Type REGULAR UNLEADED
GASOLINE ONLY
Fuel tank capacity 11 L
Fuel reserve amount 3.4 L
Carburetor
Manufacturer MIKUNI
Model × quantity BDS26 × 1
Spark plug
Manufacturer/model NGK / CR6HSA or
DENSO / U20FSR-U
Gap 0.6–0.7 mm
Clutch typeWet, multiple-disc
Transmission
Primary reduction system Spur gear
Primary reduction ratio 3.130
Secondary reduction system Chain drive
Secondary reduction ratio 2.800
Number of drive chain
sprocket teeth (front/rear) 20/56
Transmission type Constant-mesh 5-speed
Operation Left footGear ratio
1st 2.643
2nd 1.684
3rd 1.261
4th 1.000
5th 0.821
Chassis
Frame type Double cradle
Caster angle 35°
Trail 135 mm
Tires
Fr o n t
Type Tube tire
Size 80/100-18 47P
Size 80/100-18 M/C 47P
Manufacturer/
modelCHENG SHIN / C-916
IRC / MARBELLA NF27
Rear
Type Tube tire
Size 130/90-15 M/C 66P
Manufacturer/
modelCHENG SHIN / C-915
IRC / MARBELLA NR31
E_5kr.book Page 2 Friday, December 14, 2001 11:33 AM
