KTM 450 EXC-F 2020 Owner's Manual page 53

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, rocker arm and rocker arm shafts. Change the connecting rod, conrod bearing
and crank pin. Change the shaft seal ring of the water pump. Check the transmission
and shift mechanism. Check the 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.)
○
One-time interval
●
Periodic interval
Every 70 operating hours when used for motorsports
After 20 operating hours
After 10 operating hours
every 12 months
SERVICE SCHEDULE 10
Every 135 operating hours
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