2003 YAMAHA BEAR TRACKER 250 service

8-41 1. Locknut 2. Adjusting bolt a. Free play: 3–5 mm
1. Contre-écrou 2. Boulon de réglage a. Jeu: 3–5 mm
1. Contratuerca 2. Perno de ajuste a. Juego libre: 3–5 mm
EBU00303
Valve clearance adjustment
The correct valve clearance changes with use, re-
sulting in improper fuel/air supply or engine noise.
To prevent this, the valve clearance must be ad-
justed regularly. This adjustment however, should
be left to a professional Yamaha service techni-
cian.
EBU00307
Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjusting the
throttle lever free play.1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle lever
free play is 3–5 mm.
3. Tighten the locknut.
E-8.fm Page 41 Monday, June 3, 2002 11:05 AM

8-47
5. Brake fluid may deteriorate painted surfaces
or plastic parts. Always clean up spilled fluid
immediately.
6. Have a Yamaha dealer check the cause if the
brake fluid level goes down.
EBU01118
Brake fluid replacement
1. Complete fluid replacement should be done
only by trained Yamaha service personnel.
2. Have a Yamaha dealer replace the following
components during periodic maintenance or
when they are damaged or leaking.


Replace all rubber seals every two years.


Replace all hoses every four years.
U4XE64.book Page 47 Thursday, May 30, 2002 1:49 PM

8-49 a. Free play: ZERO mm
a. Jeu: ZÉRO mm
a. Juego libre: CERO mm
EBU00681
Front brake adjustment
The front brake lever should have a free play of
zero mm at the lever end. If not, ask a Yamaha
dealer to adjust it.
WARNING
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly
and that the free play is correct.


Make sure the brakes do not drag.


Make sure the brakes are not spongy. All
air must be bled from the brake system.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
U4XE64.book Page 49 Thursday, May 30, 2002 1:49 PM

8-55 1. Locknut 2. Adjusting bolt
a. Free play: 5–7 mm
1. Contre-écrou 2. Boulon de réglage
a. Jeu: 5 à 7 mm
1. Contratuerca 2. Perno de ajuste
a. Juego libre: 5–7 mm
3. Turn the adjusting bolt until free play reaches
5–7 mm at the lever pivot.
4. Tighten the locknut.
WARNING
Operating with improperly serviced or adjust-
ed brakes could cause loss of braking ability,
which could lead to an accident.
After servicing:

Make sure the brakes operate smoothly
and that the free play is correct.


Make sure the brakes do not drag.
Replacement of brake components requires
professional knowledge. These procedures
should be performed by a Yamaha dealer.
U4XE64.book Page 55 Thursday, May 30, 2002 1:49 PM

8-87
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid in-
spection 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 pow-
er. The troubleshooting chart describes a quick,
easy procedure for making checks. If your ma-
chine requires any repair, take it to a Yamaha
dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to prop-
erly service your machine. Use only genuine
Yamaha parts on your machine. Imitation parts
may look like Yamaha parts, but they are often in-
ferior. Consequently, they have a shorter service
life and can lead to expensive repair bills.
WARNING
Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe in-
jury or property damage. Make sure there are
no open flames or sparks in the area, including
pilot lights from water heaters or furnaces.
U4XE64.book Page 87 Thursday, May 30, 2002 1:49 PM