KTM 250 SX-F 2021 Owner's Manual page 38

9 SERVICE SCHEDULE
Perform minor engine service including removing and installing engine. (Change
spark plug and spark plug connector. Change piston, check and measure cylin-
der; check cylinder head. Check camshaft and cam lever. Check timing assembly.
Change intake flange.)
Perform major engine service including removing and installing the engine. (Change
valves, valve springs, valve spring seats, and valve spring retainers. Change the con-
necting rod, conrod bearing and crank pin. Check the transmission and shift mech-
anism. Check the oil pressure control valve. Change the suction pump. Check the
force pump and lubrication system. Change the timing chain. Change all engine
bearings. Change the freewheel.)
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One-time interval
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Periodic interval
36
every 12 months
Every 100 operating hours
Every 50 operating hours
After 20 operating hours
After 10 operating hours
every 48 months
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