2023-2026 KTM 250 SX / 300 SX / 250 XC / 300 XCMaintenance schedule

Motocross / cross-country - 250/300cc two-stroke

Scheduled against engine operating hours (some columns also keyed to races, motorsport use, or calendar months).

Verified

Every interval on this page was read directly from the OEM chart.

Intervals

After 1 operating hour
After 15 operating hours / Every 15 operating hours
Every 45 operating hours
Every 90 operating hours
every 24 months

Full schedule (58 items)

2023-2026 KTM 250 SX / 300 SX / 250 XC / 300 XC scheduled maintenance items and intervals
Item	Action	Interval
Change the fuel screen	Replace	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Change the gear oil	Replace	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Change the glass fiber yarn filling in the main silencer	Replace	Every 45 hrs
Change the spark plug and spark plug connector	Replace	Every 45 hrs
Check all hoses (e.g. fuel, cooling, bleeder, drainage hoses, etc.) and sleeves for cracking, tightness, and correct routing	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check all screws, nuts, and hose clips for a tight fit	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check and charge the 12-V battery	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check that the brake linings of the front brake are secured	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check that the brake linings of the rear brake are secured	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check that the electrical system is functioning properly	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check that the throttle cables are undamaged, routed without kinks, and set correctly	Inspect	Every 45 hrs / 24 mo
Check the antifreeze and coolant level	Inspect	Every 45 hrs
Check the basic throttle valve position sensor setting	Inspect	Every 45 hrs / 24 mo Also marked: After 15 operating hours / Every 15 operating hours
Check the brake discs	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the brake lines for damage and tightness	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the cables for damage and for routing without kinks	Inspect	Every 45 hrs / 24 mo
Check the chain tension	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the chain, rear sprocket, engine sprocket, and chain guide	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check the clutch	Inspect	Every 45 hrs
Check the electric starter drive	Inspect	Every 45 hrs / 24 mo
Check the fork bearing for play	Inspect	Every 45 hrs
Check the frame	Inspect	Every 45 hrs
Check the free travel of the foot brake lever	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the free travel of the hand brake lever	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the front brake fluid level	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check the fuel pressure	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the idle speed	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check the link fork	Inspect	Every 45 hrs
Check the rear brake fluid level	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check the reed valve housing, reed valve and intake flange	Inspect	Every 45 hrs
Check the rim run-out	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check the shock absorber heim joint for play	Inspect	Every 45 hrs
Check the shock absorber linkage	Inspect	Every 45 hrs
Check the spoke tension	Inspect	Every 45 hrs Also marked: After 1 operating hour
Check the tire condition	Inspect	Every 45 hrs / 24 mo
Check the wheel bearing for play	Inspect	Every 45 hrs
Check the wheel hubs	Inspect	Every 45 hrs
Check tire pressure	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Check/correct the fluid level of hydraulic clutch	Inspect	Every 45 hrs
Clean the air filter and air filter box	Clean	Every 45 hrs / 24 mo
Final check: check vehicle for operating safety	Inspect	Every 45 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 45 hrs / 24 mo Also marked: After 1 operating hour
Lubricate the steering head bearing	Lubricate	Every 45 hrs / 24 mo
Make a service entry in KTM Dealer.net	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Perform major engine service including removing and installing the engine. (Change the connecting rod, conrod bearing, and crank pin. Check the transmission and the shift mechanism. Change all the engine bearings, the radial shaft seal rings and the seals.)	Replace	Every 45 hrs
Perform minor engine service. (Change the piston. Check the cylinder head. Change the O-rings of the manifold and the cylinder head. Check the cylinder and Z dimension. Clean the exhaust control. Check the exhaust control for function and smooth operation. Program the exhaust control end positions. Check and clean the pressure sensor flange.)	Replace, Clean	Every 45 hrs
Perform the shock absorber service	Inspect	Every 45 hrs
Read out the fault memory after the test ride using the KTM diagnostics tool	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Read out the fault memory using the KTM diagnostics tool	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
Service the fork	Inspect	Every 45 hrs
Take a test ride	Inspect	Every 45 hrs / 24 mo Also marked: After 1 operating hour
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
Change the coolant	Replace	Every 24 mo
Check steering head bearing play	Inspect	One time Also marked: After 1 operating hour
Check the coolant level	Inspect	One time Also marked: After 1 operating hour

Every row above is factory schedule, straight from the chart. Intervals are shown in hrs.

Specs

From the 2024 manual's technical data section. Check yours before buying — these change between model years.

Displacement: 249 cm³ (15.19 cu in)
Idle speed: 1,500 … 1,700 rpm
Spark plug: NGK BR 8 ES
Plug gap: 0.60 mm (0.0236 in)
Gear oil: capacity: 0.80 l (0.85 qt.)
spec: 15W/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: 14:49
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 2024 250 SX / 300 SX / 250 XC / 300 XC · Chart read from the 2024 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