KTM 250 EXC-F 2019 Owner's Manual page 52

10 SERVICE SCHEDULE
Perform engine service including removing and installing the engine. (Change the spark
plug and spark plug connector. Change the piston. Check/measure the cylinder. Check
the cylinder head. Change the valves, valve springs, and valve spring seats. Check the
camshaft and cam lever. Change the connecting rod, conrod bearing, and crank pin.
Change the shaft seal rings of the water pump. Check the transmission and shift mecha-
nism. Check the oil pressure regulator valve. Change the suction pump. Check the force
pump and lubrication system. Check the timing assembly. Change the timing chain.
Change all engine bearings. Change the freewheel.)
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One-time interval
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Periodic interval
50
Every 70 operating hours when used for motorsports
Once after 20 operating hours
Once after 10 operating hours
Annually
Every 135 operating hours
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