height adjustment YAMAHA YZ250LC 2001 Manuale duso (in Italian)

3-19
REAR BRAKE ADJUSTMENT/
FRONT BRAKE PAD INSPECTION AND REPLACEMENTINSP
ADJ
EC365080
FRONT BRAKE PAD INSPECTION AND
REPLACEMENT
1. Inspect:
9Brake pad thickness a
Out of specification ÕReplace as a set.
2. Replace:
9Brake pad
Brake pad thickness a a
:
Standard
4.4 mm (0.17 in)
1.0 mm (0.04 in)
Brake pad replacement steps:
9Remove the pad pin plug 1.
EC364002
REAR BRAKE ADJUSTMENT
1. Check:
9Brake pedal height a
Out of specificationÕAdjust.
2. Adjust:
9Brake pedal height
Brake pedal height a a
:
5 mm (0.20 in)
Pedal height adjustment steps:
9Loosen the locknut 1.
9Turn the adjusting nut 2until the pedal
height ais within specified height.
9Tighten the locknut.
w
9Adjust the pedal height between the
maximum
and the minimum õ õ
as
shown. (In this adjustment the bolt 3 3
end b b
should protrude out of the lower
adjusting nut 4 4
but not be less than 2
mm (0.08 in) c c
away from the brake ped-
al 5 5
).
9After the pedal height adjustment, make
sure that the rear brake does not drag.
5MW-9-30-3B 7/3/00 3:18 PM Page 6

ENG
4-11
CARBURETOR AND REED VALVE
EC464401
Jet needle
1. Inspect:
9Jet needle 1
Bends/Wear ÕReplace.
9Clip groove
Free play exists/Wear ÕReplace.
9Clip position
*For EUROPE
EC464511
Float height
1. Measure:
9Float height a
Out of specification ÕAdjust.
Standard clip position:
No.2 Groove
*No.3 Groove
Float height:
5.5~7.5 mm (0.22~0.30 in)
Measurement and adjustment steps:
9Hold the carburetor in an upside down posi-
tion.
9Measure the distance between the mating
surface of the float chamber and top of the
float using a vernier calipers.
NOTE:
The float arm should be resting on the nee-
dle valve, but not compressing the needle
valve.
9If the float height is not within specification,
inspect the valve seat and needle valve.
9If either is worn, replace them both.
9If both are fine, adjust the float height by
bending the float tab bon the float.
9Recheck the float height.
5MW-9-30-4A 7/3/00 5:04 PM Page 22

5-23
CHASFRONT BRAKE AND REAR BRAKE
EC5A5911
Front brake hose
1. Install:
9Brake hose 1
To brake hose holder 2.
NOTE:
Before tightening the bolt (brake hose holder),
align the top aof the brake hose neck with the
brake hose holder bottom b. Then pass the
brake hose in front of the axle boss cand fit it
into the hose groove dso that the brake hose
does not contact the nut (wheel axle).
2. Install:
9Hose cover 1
9Plain washer 2
9Bolt [hose cover (M8)] 3
9Bolt [hose cover (M6)] 4
10 Nm (1.0 m•kg, 7.2 ft•lb)
16 Nm (1.6 m•kg, 11 ft•lb)
7 Nm (0.7 m•kg, 5.1 ft•lb)
4. Install:
9Pin 1
9Plain washer 2
9Cotter pin 3
NOTE:
After installing, check the brake pedal height.
Refer to “REAR BRAKE ADJUSTMENT” section
in the CHAPTER 3.
3. Pass the brake hose through the cable
guide 1, then through the guide aon the
protector 2.
5MW-9-30-5A 7/6/00 8:58 AM Page 46