Yamaha YZ125 2009 User Manual

3-14
CHASSIS
2. Remove:
• Brake lever cover
3. Adjust:
• Brake lever position
Brake lever position adjustment steps:
a. Loosen the locknut "1".
b. Turn the adjusting bolt "2" until the lever po-
sition "a" is within specified position.
c. Tighten the locknut.
Be sure to tighten the locknut, as it will
cause poor brake performance.
4. Install:
• Brake lever cover
ADJUSTING THE REAR BRAKE
1. Check:
• Brake pedal height "a"
Out of specification → Adjust.
2. Adjust:
• Brake pedal height
Pedal height adjustment steps:
a. Loosen the locknut "1".
b. Turn the adjusting nut "2" until the pedal
height "a" is within specified height.
c. Tighten the locknut.
• Adjust the pedal height between the maxi-
mum "A" and the minimum "B" as shown.
(In this adjustment, the bolt "3" end "b"
should protrude out of the threaded por-
tion "4" but not be less than 2 mm (0.08 in)
"c" away from the brake pedal "5").
• After the pedal height adjustment, make
sure that the rear brake does not drag.
CHECKING AND REPLACING THE FRONT
BRAKE PADS
1. Inspect:
• Brake pad thickness "a"
Out of specification → Replace as a set.
Locknut:
5 Nm (0.5 m •kg, 3.6 ft•lb)
Brake pedal height "a":
Zero mm (Zero in)
Brake pad thickness:
4.4 mm (0.17 in)
<Limit>: 1.0 mm (0.04 in)

Yamaha YZ125 2009 Specifications

General

Engine Type	124cc liquid-cooled 2-stroke; reed-valve inducted
Bore x Stroke	54.0mm x 54.5mm
Compression Ratio	8.6~10.7:1
Ignition	CDI
Final Drive	Chain
Front Brake	Hydraulic single disc brake, 250mm
Rear Brake	Hydraulic single disc brake, 245mm
Front Tire	80/100-21
Rear Tire	100/90-19
Overall Width	32.5 in
Wheelbase	58.3 in
Fuel Capacity	2.1 gal
Wet Weight	207 lb
Dry Weight	194 lb
Fuel Delivery	Mikuni® TMX 38
Front Suspension	Speed-sensitive inverted fork; fully adjustable, 11.8 in travel
Rear Suspension	Fully adjustable, 12.4-in travel