YAMAHA BANSHEE 350 2009 Owners Manual

8-26
1
2
3
4
5
6
78
9
10
11

9. Loosen the carburetor joint screws.10. Remove the mixing chamber cap.
11. Remove the throttle cable from the throttle
valve, and then remove the throttle cable hold-
er by removing the screws.
1. Mixing chamber cap securing plate
2. Screw
21

1. Joint screw1
11
1

8-27
1
2
3
4
5
6
78
9
10
11

12. Remove the carburetor, and then remove the
float chamber by removing the screws.
1. Throttle cable
2. Throttle valve
3. Throttle cable holder
4. Screw
1
2
3 4

1. Float chamber
2. Screw
1
2 2
2
2

8-28
1
2
3
4
5
6
78
9
10
11

13. Remove the float and needle valve.
14. Change the main jet and the jet needle clip po-
sition.
TIP


Optional main jets can be obtained at a Yamaha
dealer.

After the jet needle clip position is changed, the
throttle cables may need to be adjusted.Assembling and installing the carburetors
Assemble and install both carburetors by the fol-
lowing steps.
1. Install the needle valve and float.
2. Install the float chamber by installing the
screws.
3. Install the carburetor and tighten the joint
screws.
4. Assemble the throttle valve.
5. Install the mixing chamber cap, and then tight-
en it securely to the specified torque.
6. Install the mixing chamber cap securing plate
by installing the screw.NOTICE

ECB00501
Be sure to match one of the projections on the
carburetor cap with one of the slots on the se-
curing plate. If the securing plate does not
match a projection, tighten the carburetor cap
until they align. Do not loosen the carburetor
cap.
1. Float
2. Needle valve
3. Main jet
1
2 3

Tightening torque:
Mixing chamber cap:
4 Nm (0.4 m·kgf, 2.9 ft·lbf)

8-29
1
2
3
4
5
6
78
9
10
11

7. Tighten the mixing chamber cap securing
plate screw to the specified torque.
8. Tighten the carburetor joint screws.
Adjusting the throttle cables
1. Move the throttle lever a few times.
2. Push the throttle lever forward until it stops
and hold it in this position.
3. Check through each carburetor window to see
if the punch mark on the throttle valve is at the
specified position.
4. If not, loosen the locknut and turn the adjust-
ing nut until the specified position is obtained.
1. Mixing chamber cap securing plate
2. Projection
3. Slot
4. Screw
Tightening torque:
Mixing chamber cap securing plate screw:
3.5 Nm (0.35 m·kgf, 2.5 ft·lbf)
12
3
4

1. Punch mark
2. Specified position: 0–1mm
1
2

8-30
1
2
3
4
5
6
78
9
10
11

5. Move the throttle lever a few times and re-
check the position.
6. Install the fuel tank, side cover, radiator cover
and air filter case cover.
7. Connect the fuel hoses.
8. Install the seat.
EBU24020
Adjusting the engine idling speed
The engine idling speed must be checked and, if
necessary, adjusted as follows at the intervals
specified in the periodic maintenance and lubrica-tion chart.
TIP


A diagnostic tachometer is needed to make this
adjustment.

The carburetor synchronization and the throttle
cable free play must be checked, and adjusted if
necessary, before adjusting the engine idling
speed.
1. Start the engine and warm it up.
TIP

The engine is warm when it quickly responds to the
throttle.
2. Attach the tachometer to the spark plug lead.
3. Turn in both pilot air screws until they lightly
seat.
4. Turn out both pilot air screws to specification.
(See the “Changing the carburetor settings”
section on the page 8-22.)
1. Adjusting nut
2. Locknut
1
2

8-31
1
2
3
4
5
6
78
9
10
11

5. Remove the seat. (See page 4-11.)
6. Check the engine idling speed and, if neces-
sary, adjust it to specification by turning the
throttle stop screws at the carburetors. To in-
crease the engine idling speed, turn the throt-
tle stop screws in direction (a), and to
decrease it, turn the screws in direction (b).NOTICE
ECB00510

The throttle stop screws were preset at the
factory. When adjusting the idling speed,
turn both throttle stop screws the same
amount, otherwise the carburetor synchroni-
zation will be incorrect.

Adjusting the pilot air screws and the idling
speed are separate procedures, but they
must be adjusted at the same time to achieve
1. Pilot air screw
1

1. Throttle stop screw
Engine idling speed:
1450–1550 r/min
1
(b)
(a)
(a)
(b)

8-32
1
2
3
4
5
6
78
9
10
11

optimum engine performance.
TIP

If the specified idling speed cannot be obtained as
described above, have a Yamaha dealer make the
adjustment.
7. Install the seat.
EBU24044
Adjusting the throttle cable free play
The throttle cable free play should be checked
and, if necessary, adjusted at the intervals speci-
fied in the periodic maintenance and lubrication
chart.
The throttle cable free play should measure 4.0–
6.0 mm (0.16–0.24 in) at the throttle lever. Period-
ically check the throttle cable free play and, if nec-
essary, adjust it as follows.
TIP

The engine idling speed must be checked, and ad-
justed if necessary, before adjusting the throttle ca-
ble free play.
1. Loosen the locknut.
2. To increase the throttle cable free play, turn
the throttle cable free play adjusting bolt in di-rection (a). To decrease the throttle cable free
play, turn the adjusting bolt in direction (b).
3. Tighten the locknut.
EBU24130
Checking the front and rear brake pads
The front and rear brake pads must be checked for
wear at the intervals specified in the periodic main-
tenance and lubrication chart.
1. Throttle lever free play adjusting bolt
2. Locknut
3. Throttle cable free play
1
2
3
(a)(b)

8-33
1
2
3
4
5
6
78
9
10
11

EBU24140
Front brake pads
Each brake pad is provided with a wear indicator,
which allows you to check the brake pad wear
without having to disassemble the brake. To check
the brake pad wear, check the position of the wear
indicator while applying the brake. If a brake pad
has worn to the point that the wear indicator almost
touches the brake disc, have a Yamaha dealer re-
place the brake pads as a set.
EBU24190
Rear brake pads
Each brake pad is provided with a wear indicator,
which allows you to check the brake pad wearwithout having to disassemble the brake. To check
the brake pad wear, check the position of the wear
indicator while applying the brake. If a brake pad
has worn to the point that the wear indicator almost
touches the brake disc, have a Yamaha dealer re-
place the brake pads as a set.
EBU24251
Checking the brake fluid level
Insufficient brake fluid may allow air to enter the
brake system, possibly causing it to become inef-
fective.
Before riding, check that the brake fluid is above
the minimum level mark and replenish if neces-
1. Wear indicator
1

1. Wear indicator
11

8-34
1
2
3
4
5
6
78
9
10
11

sary. A low brake fluid level may indicate worn
brake pads and/or brake system leakage. If the
brake fluid level is low, be sure to check the brake
pads for wear and the brake system for leakage.
Front brakeRear brake
Observe these precautions:

When checking the fluid level, make sure that
the top of the brake fluid reservoir is level.

Use only the recommended quality brake fluid,
otherwise the rubber seals may deteriorate,
causing leakage and poor braking performance.

Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reaction
and lead to poor braking performance.
1. Minimum level mark
LOWER
1

1. Minimum level mark
Recommended brake fluid:
DOT 4
LOWER
1

8-35
1
2
3
4
5
6
78
9
10
11


Be careful that water does not enter the brake
fluid reservoir when refilling. Water will signifi-
cantly lower the boiling point of the fluid and may
result in vapor lock.

Brake fluid may deteriorate painted surfaces or
plastic parts. Always clean up spilled fluid imme-
diately.

As the brake pads wear, it is normal for the brake
fluid level to gradually go down. However, if the
brake fluid level goes down suddenly, have a
Yamaha dealer check the cause.
EBU24291
Changing the brake fluid
Have a Yamaha dealer change the brake fluid at
the intervals specified in the TIP after the periodic
maintenance and lubrication chart. In addition,
have the oil seals of the master cylinders and cali-
pers as well as the brake hoses replaced at the in-
tervals listed below or whenever they are damaged
or leaking.

Oil seals: Replace every two years.

Brake hoses: Replace every four years.
EBU24393
Checking the front brake lever free play
The brake lever free play must be checked at the
intervals specified in the periodic maintenance and
lubrication chart. The brake lever should have no
free play as shown. If there is free play, have a
Yamaha dealer check the brake system.
WARNING

EWB02471
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident.
After servicing:
1. Brake lever free play
1