2003 YAMAHA BANSHEE 350R fuel

8-113
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid
inspection before shipment from the factory,
trouble may occur during operation.
Any problem in the fuel, compression, or ignition
systems can cause poor starting and loss of
power. The troubleshooting chart describes a
quick, easy procedure for making checks. If your
machine requires any repair, take it to a Yama-
ha dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to
properly service your machine. Use only gen-
uine Yamaha parts on your machine. Imitation
parts may look like Yamaha parts, but they are
often inferior. Consequently, they have a shorter
service life and can lead to expensive repair
bills.
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8-115
w
Do not smoke when checking the fuel sys-
tem. Fuel can ignite or explode, causing
severe injury or property damage. Make sure
there are no open flames or sparks in the
area, including pilot lights from water
heaters or furnaces.
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8-117
EBU00440
Troubleshooting chart
Starting problems or poor engine performance
Check fuel flow
1. Fuel
Check if there is
fuel in the fuel
tank
2. Compression
Kick the kick starter
to see if there is
compression
3. Ignition
Remove plugs and
check electrodes
WetWipe clean with
dry cloth
DryAttach plug cap and
ground to chassisKick the kick
starter stronglySpark weak
Spark goodIgnition system normal
No spark
Ask a Yamaha dealer to inspect
Adjust plug gap or
replace plug(s)
There is compressonCompression normal
Ask a Yamaha dealer to inspectNo compression
There is fuelTurn the fuel
cock to “OFF”
Remove the
fuel pipeNo fuelFuel cock clogged
Some fuelTurn the fuel
cock to “RES”Restart engine
No fuelSupply fuel
Clean fuel cock
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9-7
EBU00529
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. Drain the fuel tank, fuel lines and carbure-
tor float bowls.
2. Remove the spark plugs, pour about one
tablespoon of SAE 10W30 or 20W40
motor oil in the spark plug holes and rein-
stall the spark plugs. Ground the spark
plug wires and turn the engine over several
times to coat the cylinder walls with oil.
3. Clean the drive chain thoroughly and lubri-
cate it. (See page 8-95 for details.)
Reinstall the chain or store it in a plastic
bag tied to frame for safekeeping.
4. Lubricate all control cables.
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10-1
Model YFZ350
Dimensions:
Overall length 1,855 mm
Overall width 1,100 mm
Overall height 1,080 mm
Seat height 800 mm
Wheelbase 1,280 mm
Minimum ground clearance 135 mm
Minimum turning radius 3,600 mm
Basic weight:
With oil and full fuel tank 187 kg
Engine:
Engine type Liquid-cooled 2-stroke
Cylinder arrangement Forward-inclined parallel 2-cylinder
Displacement 347 cm
3
Bore × stroke 64 ×54 mm
Compression ratio 6.5 : 1
Starting system Kick starter
Lubrication system Premix
EBU00428
SPECIFICATIONS
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10-3
Model YFZ350
Fuel:
Type Premium unleaded fuel, Premix
Tank capacity 12.0 L
Reserve amount 2.5 L
Carburetor:
Type/quantity VM26SS/2
Manufacturer MIKUNI
Spark plug:
Type/Manufacturer BR8ES/NGK
Spark plug gap 0.7–0.8 mm
Clutch type: Wet, multiple-disc
Transmission:
Primary reduction system Helical gear
Primary reduction ratio 66/23 (2.869)
Secondary reduction system Chain drive
Secondary reduction ratio 41/14 (2.929)
Transmission type Constant mesh 6-speed
Operation Left foot operation
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