KTM 125 SX 2023 User Manual

12 BRAKE SYSTEM
90
W00090-11
Main work
– Stand the vehicle upright.
–
Remove screw cap
1
with membrane
2
and the O-ring.
–
Add brake fluid up to the marking
A
.
Brake fluid DOT 4 / DOT 5.1 ( p. 138)
– Mount and tighten the screw cap with the membrane and O-
ring.
Info
Use water to immediately clean up any brake fluid that
has overflowed or spilled.
Finishing work
– Install the frame protector. ( p. 61)
12.12 Checking that the brake linings of the rear brake are secured
Warning
Danger of accidents Worn-out brake linings reduce the braking effect.
– Ensure that worn-out brake linings are replaced immediately. (Your authorized KTM workshop will be
glad to help.)
S05376-10
–
Check the brake linings for lining thickness
A
.
Minimum thickness
A
≥ 1 mm (≥ 0.04 in)
» If it is less than the minimum thickness:
– Change the rear brake linings. ( p. 90)
– Check the brake linings for damage and cracking.
» If there is damage or cracking:
– Change the rear brake linings. ( p. 90)
– Check that the brake linings are secured.
» If the brake linings are not secured correctly:
– Secure brake linings, replace with new parts if neces-
sary.
12.13 Changing the rear brake linings
Warning
Danger of accidents Incorrect servicing will cause the brake system to fail.
– Ensure that service work and repairs are performed professionally. (Your authorized KTM workshop
will be glad to help.)

KTM 125 SX 2023 Specifications

General

Displacement	124.8 cm³
Bore x Stroke	54 mm x 54.5 mm
Starter	Electric starter
Transmission	6-speed
Front Suspension	WP XACT-USD, Ø 48 mm
Rear Suspension	WP XACT Monoshock with linkage
Front Brake	Disc brake
Rear Brake	Disc brake
Ground Clearance	375 mm
Seat Height	950 mm
Weight (without fuel)	87.5 kg
Cooling	Liquid cooled
Front Tire	80/100-21"
Rear Tire	100/90-19"
Front Brake Diameter	260 mm
Rear Brake Diameter	220 mm
Engine Type	Single-cylinder, 2-stroke
Frame	Central tube frame made of chrome molybdenum steel
Fuel Tank Capacity	7.2 liters