KTM 350 EXC-F 2021 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 cylin-
der. Check the cylinder head. Change the valves, valve springs, and valve spring
seats. Check the camshaft and cam lever. Change the connecting rod, conrod bear-
ing and crank pin. Change the shaft seal rings of the water pump. Check the trans-
mission and shift mechanism. Check oil pressure control 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
After 20 operating hours
After 10 operating hours
every 48 months
every 12 months
Every 135 operating hours
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