KTM 125 SX 2023 Owner's Manual page 37

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Check the spoke tension. (
Check the chain, rear sprocket, engine sprocket, and chain guide. (
Check the chain tension. (
Grease all moving parts (e.g., hand lever, chain,...) and check for smooth operation.
Check the basic throttle valve position sensor setting.
Change the spark plug and spark plug connector.
Change the fuel filter.
Check the clutch.
Clean the air filter and air filter box.
Change the glass fiber yarn filling in the main silencer.
Service the fork.
Perform the shock absorber service.
Check all screws, nuts, and hose clips for a tight fit.
Change the fuel screen.
(
Check the fuel pressure.
Check the antifreeze and coolant level. (
Check the coolant level. (
Change the coolant.
(
p. 103)
Check steering head bearing play. (
Lubricate the steering head bearing.
Check the electric starter drive.
Check the reed valve housing, reed valve and intake flange.
Perform minor engine service. (Change the piston. Check the cylinder head. Change the
O-rings of the manifold and the cylinder head. Check the cylinder and Z dimension.
Clean the exhaust control. Check the exhaust control for function and smooth opera-
tion. Program the exhaust control end positions. Check and clean the pressure sensor
flange.)
Perform major engine service including removing and installing the engine. (Change the
connecting rod, conrod bearing, and crank pin. Check the transmission and the shift
mechanism. Change all the engine bearings, the radial shaft seal rings and the seals.)
Final check: check vehicle for operating safety.
Take a test ride.
Read out the fault memory after the test ride using the KTM diagnostics tool.
Make a service entry in KTM Dealer.net.
One-time interval
Periodic interval
After 15 operating hours / Every 15 operating hours
p. 98)
p. 72)
(
p. 65)
p. 117)
p. 99)
p. 100)
p. 54)
(
p. 55)
Every 90 operating hours
Every 45 operating hours
After 1 operating hour
p. 74)
(
p. 68)
SERVICE SCHEDULE 9
every 24 months
35

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