2023-2026 KTM 450 SX-F / 450 XC-F / 450 SX-F Factory EditionMaintenance schedule
Motocross / cross-country - 450cc four-stroke
Scheduled against engine operating hours (some columns also keyed to races, motorsport use, or calendar months).
Verified
Open the hour meter toolEvery interval on this page was read directly from the OEM chart.
Intervals
- After 1 operating hour
- Every 15 operating hours
- Every 45 operating hours
- Every 90 operating hours
- every 24 months
Full schedule (58 items)
| Item | Action | Interval |
|---|---|---|
Check the coolant level | Inspect | Every 15 hrs Also marked: After 1 operating hour |
Check the steering head bearing for play | Inspect | Every 15 hrs Also marked: After 1 operating hour |
Change the engine oil and the oil filter, clean the oil screens | Replace, Clean | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Change the fuel screen | Replace | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check all hoses (e.g. fuel, cooling, bleeder, drainage hoses, etc.) and sleeves for cracking, tightness, and correct routing | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check all screws, nuts, and hose clips for a tight fit | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check and charge the 12-V battery | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check that the brake linings of the front brake are secured | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check that the brake linings of the rear brake are secured | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check that the electrical system is functioning properly | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check that the throttle cables are undamaged, routed without kinks, and set correctly | Inspect | Every 30 hrs / 24 mo |
Check the brake discs | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the brake lines for damage and tightness | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the cables for damage and for routing without kinks | Inspect | Every 30 hrs / 24 mo |
Check the chain tension | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the chain, rear sprocket, engine sprocket, and chain guide | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check the clutch | Inspect | Every 30 hrs |
Check the frame | Inspect | Every 30 hrs |
Check the free travel of the foot brake lever | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the free travel of the hand brake lever | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the front brake fluid level | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check the idle speed | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Check the link fork | Inspect | Every 30 hrs |
Check the rear brake fluid level | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check the rim run-out | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check the shock absorber linkage | Inspect | Every 30 hrs |
Check the spoke tension | Inspect | Every 30 hrs Also marked: After 1 operating hour |
Check the tire condition | Inspect | Every 30 hrs / 24 mo |
Check the wheel bearing for play | Inspect | Every 30 hrs |
Check the wheel hubs | Inspect | Every 30 hrs |
Check tire pressure | Inspect | Every 30 hrs / 24 mo |
Clean the air filter and air filter box | Clean | Every 30 hrs / 24 mo |
Enter electronic proof of service in the dealer portal | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Final check: check vehicle for operating safety | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Grease all moving parts (e.g., hand lever, chain,...) and check for smooth operation | Lubricate | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Program the gear position sensor | Inspect | Every 30 hrs |
Read out the fault memory using the KTM diagnostics tool | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Read out the fault memory using the KTM diagnostics tool after a test ride | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Take a test ride | Inspect | Every 30 hrs / 24 mo Also marked: After 1 operating hour |
Change the glass fiber filling of the main silencer | Replace | Every 45 hrs |
Change the spark plug and spark plug connector | Replace | Every 45 hrs |
Check the antifreeze and coolant level | Inspect | Every 45 hrs |
Check the fork bearing for play | Inspect | Every 45 hrs |
Check the fuel pressure | Inspect | Every 45 hrs / 24 mo Also marked: After 1 operating hour |
Check the shock absorber heim joint for play | Inspect | Every 45 hrs |
Check the valve clearance | Inspect | Every 45 hrs Also marked: After 1 operating hour |
Check/correct the fluid level of hydraulic clutch | Inspect | Every 45 hrs |
Lubricate the steering head bearing | Lubricate | Every 45 hrs / 24 mo |
Perform minor engine service including removing and installing the engine. (Change the piston, check/measure the cylinder. Check the cylinder head. Check the camshafts and valve train system components. Check the timing assembly. Change the radial shaft seal rings of the water pump. Change the crankshaft seal ring. Change the intake flange. Change inlet sleeve | Replace | Every 45 hrs |
Perform the shock absorber service | Inspect | Every 45 hrs |
Service the fork. (All SX‑F models) | Inspect | Every 45 hrs |
Service the fork. (XC‑F US) | Inspect | Every 45 hrs |
Change the front brake fluid | Replace | Every 90 hrs / 24 mo |
Change the fuel filter | Replace | Every 90 hrs / 24 mo |
Change the hydraulic clutch fluid | Replace | Every 90 hrs / 24 mo |
Change the rear brake fluid | Replace | Every 90 hrs / 24 mo |
Perform major engine service, engine is removed. (Change valves, valve springs, valve spring seats, and valve spring retainer. Change the connecting rod, conrod bearing and crank pin. Check the transmission and the shift mechanism. 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 and all gaskets. Change the freewheel.) | Replace | Every 90 hrs |
Change the coolant | Replace | Every 24 mo |
Every row above is factory schedule, straight from the chart. Intervals are shown in hrs.
Specs
From the 2025 manual's technical data section. Check yours before buying — these change between model years.
- Displacement
- 449.9 cm³ (27.455 cu in)
- Compression ratio
- 13.6:1
- Idle speed
- 2,200 … 2,300 rpm
- Valve clearance (cold)
- intake: 0.10 … 0.15 mm (0.0039 … 0.0059 in)
- exhaust: 0.12 … 0.17 mm (0.0047 … 0.0067 in)
- Spark plug
- NGK LMAR9AI-10
- Plug gap
- 1.0 mm (0.039 in)
- Engine oil
- capacity: 1.20 l (1.27 qt.)
- spec: SAE 10W/50
- Coolant
- capacity: 0.95 l (1 qt.)
- Fuel
- tank: 7.2 l (1.9 US gal)
- Tire pressure (cold)
- off-road front: 1.0 bar (15 psi)
- off-road rear: 1.0 bar (15 psi)
- Secondary ratio
- 13:51
- Drive chain
- 5/8 x 1/4"
Legend
- one-time — One-time interval - performed once when that figure is reached
- periodic — Periodic interval - repeated every time that figure comes round
From the manual
- Any further work resulting from the required or recommended work must be ordered and invoiced separately.
- Different service intervals may apply in your country depending on local operating conditions.
- Work in the service schedule must be carried out by an authorised KTM workshop and recorded, otherwise warranty claims are void.
Source: KTM Owner's Manual 2025 450 SX-F / 450 XC-F / 450 SX-F Factory Edition · Chart read from the 2025 manual. Intervals change between model years — confirm against yours.
Always confirm intervals, torque specs and part numbers against your own service manual. This site is a shopping aid, not a repair manual.
Open the hour meter tool