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KTM · Shim-adjusted overhead-cam four-stroke, wet sump, gearbox shares engine oil, chain drive

EXC 450

Library entry covers 2003-2025

55 factory 30 guideline

Published source

KTM 450/500 EXC-F, 500 XCF-W owner's manual 2020 (art. no. 3214012en), ch.10 Service schedule pp.49-51; Wayback copy

Factory owner's handbook. Covers 2020 450/500 EXC-F owner's manual, art. no. 3214012en (four-stroke EXC-F).

85 items for a 2024 model, grouped by interval the way a factory chart is laid out.

How this bike is built (what the schedule is based on)

Engine cycle: Four-stroke
Engine lubrication: Wet sump (oil in crankcase)
Oil filtration: Replaceable cartridge or spin-on filter
Valve gear: Overhead cam, shim adjusted (incl. desmo)
Ignition: Electronic (CDI / transistor / ECU)
Charging: Alternator / stator with rectifier
Battery: Wet cell (flooded lead-acid, needs topping up)
Fuel system: Fuel injection
Cooling: Liquid cooled
Primary drive: Gear or chain inside engine, shares engine oil
Gearbox oil: Shares engine oil
Clutch control: Hand lever, cable
Final drive: Chain
Front suspension: Telescopic fork
Rear suspension: Swingarm, single shock / cantilever
Front brake: Disc, hydraulic
Rear brake: Disc, hydraulic
Wheels: Spoked, tubed
Sidecar: No sidecar

Maintenance schedule

2024 KTM EXC 450

On the road: every 200 mi

1 item

Check engine oil level

Pre-ride / on the road

Guideline

Each fuel stop on old machines. Dry sump: check the tank hot, engine idling or just stopped, per your manual.

On the road: every 300 mi

3 items

Check lights, horn, brake light switches

Pre-ride / on the road

Guideline
Check tire pressures

Pre-ride / on the road

Guideline
Lubricate drive chain

Pre-ride / on the road

Guideline

Lube warm, ideally at the end of the riding day so it soaks in overnight. Sooner after rain.

On the road: every 500 mi

1 item

Check coolant level

Pre-ride / on the road

Guideline

On the road: every 600 mi

1 item

Check chain slack and rear wheel alignment

Pre-ride / on the road

Guideline

Every 3,000 mi or 12 months

4 items

Clean drive chain thoroughly (remove and soak, re-lube)

Final drive

Guideline

Non O-ring chains on old machines: remove, clean, soak in hot chain grease or lube, refit with the master link clip closed end leading.
Inspect fork seals, stanchions and fork boots

Front end

Guideline
Check footrests, pegs, rear brake and gear lever pivots

Rear suspension and frame

Guideline
Grease and check center / side stand and springs

Rear suspension and frame

Guideline

Every 4,000 mi or 12 months

2 items

Inspect, clean and gap spark plugs

Engine

Guideline
Adjust clutch free play, lubricate cable and lever pivot

Primary and gearbox

Guideline

Every 6,000 mi or 12 months

2 items

Check charging voltage and regulator / cut-out

Ignition and electrics

Guideline
Lubricate speedometer / tachometer cables, check drive

Controls and cables

Guideline

A dry speedo cable whips the needle and eventually kills the instrument.

Every 10,000 mi or 2 years

1 item

Compression test (or leak-down)

Engine

Guideline

Every 12,000 mi or 2 years

3 items

Replace air filter element

Fuel and air

Guideline
Synchronize throttle bodies

Fuel and air

Guideline
Grease swingarm pivot

Rear suspension and frame

Guideline

Every 15,000 mi or 4 years

1 item

Check valve clearances (shim adjusted)

Engine

Guideline

Every 16,000 mi or 4 years

1 item

Replace spark plugs

Engine

Guideline

Every 18,000 mi

1 item

Replace chain and sprockets (wear based)

Final drive

Guideline

Every 20,000 mi or 4 years

1 item

Repack / replace wheel bearings

Wheels and tires

Guideline

Cup-and-cone and taper roller hubs need periodic repacking and adjustment.

Every 25,000 mi or 6 years

1 item

Replace swingarm bushes / bearings

Rear suspension and frame

Guideline

Every 30,000 mi or 6 years

1 item

Rebuild forks: seals, bushes, springs

Front end

Guideline

Every 10 h or 12 months

1 item

Clean the spark arrestor. (XCF-W)

Engine

Factory

Factory: Service schedule pp.49-50 (required work: after 1 operating hour one-time, every 15, 30 and 45 operating hours, every 10 operating hours when used for motorsports; recommended work: every 12 months, after 10 and after 20 operating hours, every 70 operating hours for motorsports, every 135 operating hours): recommended work, every 12 months; XCF-W only. (Read from ManualsLib, KTM 450 EXC-F 2020 owner's manual pp.49-50, the same owner's manual as the source.)

Every 15 h

40 items

Change engine oil

Engine

Factory

Manual: Change the engine oil and oil filter, clean the oil screens. Factory: Every 15 operating hours (10 h motorsports); once after 1 hour
Check that the electrical system is functioning properly.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Check that the radiator fan is functioning properly.

Engine

Factory

Factory: Service schedule pp.49-50 (required work: after 1 operating hour one-time, every 15, 30 and 45 operating hours, every 10 operating hours when used for motorsports; recommended work: every 12 months, after 10 and after 20 operating hours, every 70 operating hours for motorsports, every 135 operating hours): required work, once after 1 operating hour, then every 15 operating hours (also marked at 30 and 45). (Read from ManualsLib, KTM 450 EXC-F 2020 owner's manual pp.49-50, the same owner's manual as the source.)
Check the antifreeze and coolant level.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Check the headlight setting.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Check the idle speed.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Check the rim run-out.

Engine

Factory

Factory: Service schedule pp.49-50 (required work: after 1 operating hour one-time, every 15, 30 and 45 operating hours, every 10 operating hours when used for motorsports; recommended work: every 12 months, after 10 and after 20 operating hours, every 70 operating hours for motorsports, every 135 operating hours): required work, once after 1 operating hour, then every 15 operating hours (also marked at 30 and 45). (Read from ManualsLib, KTM 450 EXC-F 2020 owner's manual pp.49-50, the same owner's manual as the source.)
Check the tightness of the easily accessible, safety-relevant screws and nuts.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Clean oil strainers / mesh screens

Engine

Factory

Manual: Clean the oil screens. Factory: Every 15 operating hours, with oil change
Final check: Check the vehicle is roadworthy and take a test ride.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Inspect coolant hoses and clamps

Engine

Factory

Manual: Check all hoses and sleeves for cracking, leaks, and incorrect routing. Factory: Every 15 operating hours
Make a service entry in KTM Dealer.net.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Read out the error memory after the test ride using the KTM diagnostics tool.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Read out the fault memory using the KTM diagnostics tool.

Engine

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Replace oil filter

Engine

Factory

Manual: Change the engine oil and oil filter. Factory: Every 15 operating hours, with oil change
Check the fuel pressure.

Fuel and air

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check throttle cable(s) free play and return

Fuel and air

Factory

Manual: Check that the throttle cables are undamaged, routed and set correctly. Factory: Every 15 operating hours
Clean / inspect air filter

Fuel and air

Factory

Manual: Clean the air filter and air filter box. Factory: Every 15 operating hours
Replace fuel filter

Fuel and air

Factory

Manual: Change the fuel screen. Factory: Every 15 operating hours; fuel filter every 135 operating hours
Clean battery terminals, check charge and strap

Ignition and electrics

Factory

Manual: Check and charge the 12-V battery. Factory: Every 15 operating hours
Check/correct the fluid level of the hydraulic clutch.

Primary and gearbox

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check the chain tension.

Final drive

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Inspect chain and sprockets for wear (measure stretch)

Final drive

Factory

Manual: Check the chain, rear sprocket, engine sprocket, and chain guide. Factory: Every 15 operating hours
Check steering head bearing adjustment

Front end

Factory

Manual: Check steering head bearing play. Factory: Every 15 operating hours; once after 1 hour
Check the link fork.

Front end

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Clean and grease rear suspension linkage

Rear suspension and frame

Factory

Manual: Check the heim joint for play. Factory: Every 15 operating hours
Inspect frame, welds and lugs for cracks

Rear suspension and frame

Factory

Manual: Check the frame. Factory: Every 15 operating hours; link fork also
Check brake pads and discs

Brakes

Factory

Manual: Check the front / rear brake linings, brake discs. Factory: Every 15 operating hours
Check front brake fluid level.

Brakes

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check the free travel of the foot brake lever.

Brakes

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check the free travel of the hand brake lever.

Brakes

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check the rear brake fluid level.

Brakes

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Inspect brake hoses; replace old rubber

Brakes

Factory

Manual: Check the brake lines for damage and leakage. Factory: Every 15 operating hours
Check spoke tension and wheel true

Wheels and tires

Factory

Manual: Check the spoke tension. Factory: Every 15 operating hours; once after 1 hour
Check the wheel hubs.

Wheels and tires

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Check tire pressure.

Wheels and tires

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours; ○ After 1 operating hour
Check wheel bearings for play

Wheels and tires

Factory

Manual: Check the wheel bearing for play. Factory: Every 15 operating hours
Inspect tire tread, sidewalls and date codes

Wheels and tires

Factory

Manual: Check the tire condition. Factory: Every 15 operating hours; once after 1 hour
Check the cables for damage and for routing without kinks.

Controls and cables

Factory

Factory: As printed: ● Every 10 operating hours when used for motorsports; ● Every 45 operating hours; ● Every 30 operating hours; ● Every 15 operating hours
Lubricate control cables and lever pivots

Controls and cables

Factory

Manual: Grease all moving parts (side stand, hand lever, chain) and check. Factory: Every 15 operating hours

Every 30 h

4 items

Change the glass fiber yarn filling of the main muffler

Engine

Factory

Factory: Every 30 operating hours; 10 h for motorsports
Check and adjust valve clearances

Engine

Factory

Manual: Check the valve clearance. Factory: Every 30 operating hours; once after 1 operating hour
Inspect clutch plates and springs

Primary and gearbox

Factory

Manual: Check the clutch. Factory: Every 30 operating hours; every 10 h when used for motorsports
Check swingarm bushes for play

Rear suspension and frame

Factory

Manual: Check the fork bearing for play. Factory: Every 30 operating hours (published as fork bearing)

Every 45 h

3 items

Check the inlet membrane. (XCF-W)

Engine

Factory

Factory: Service schedule pp.49-50 (required work: after 1 operating hour one-time, every 15, 30 and 45 operating hours, every 10 operating hours when used for motorsports; recommended work: every 12 months, after 10 and after 20 operating hours, every 70 operating hours for motorsports, every 135 operating hours): required work, every 45 operating hours; XCF-W only. (Read from ManualsLib, KTM 450 EXC-F 2020 owner's manual pp.49-50, the same owner's manual as the source.)
Change fork oil

Front end

Factory

Manual: Service the fork. Factory: Every 45 operating hours; recommended once after 10 hours
Inspect rear shocks for leaks and damping

Rear suspension and frame

Factory

Manual: Perform the shock absorber service. Factory: Every 45 operating hours; recommended once after 20 hours

Every 135 h

2 items

Change the fuel filter.

Fuel and air

Factory

Factory: Service schedule pp.49-50 (required work: after 1 operating hour one-time, every 15, 30 and 45 operating hours, every 10 operating hours when used for motorsports; recommended work: every 12 months, after 10 and after 20 operating hours, every 70 operating hours for motorsports, every 135 operating hours): recommended work, every 135 operating hours. (Read from ManualsLib, KTM 450 EXC-F 2020 owner's manual pp.49-50, the same owner's manual as the source.)
Perform engine service (plug, piston, valves, conrod, timing chain, bearings)

Final drive

Factory

Factory: Recommended; every 135 operating hours, 70 h for motorsports

Every 12 months

3 items

Replace hydraulic clutch fluid

Primary and gearbox

Factory

Manual: Change the hydraulic clutch fluid. Factory: Recommended work; every 12 months
Repack / replace steering head bearings

Front end

Factory

Manual: Lubricate the steering head bearing. Factory: Recommended work; every 12 months
Replace brake fluid

Brakes

Factory

Manual: Change the front / rear brake fluid. Factory: Recommended work; every 12 months

Every 2 years

2 items

Replace coolant

Engine

Guideline
Inspect wiring, bullet connectors and ground points

Ignition and electrics

Guideline

Every 4 years

2 items

Replace fuel lines

Fuel and air

Guideline

Old rubber and modern ethanol fuel do not mix well.
Rebuild calipers and master cylinders (seals)

Brakes

Guideline

Every 6 years

2 items

Replace inner tubes and rim tape with tires

Wheels and tires

Guideline
Replace tires on age (regardless of tread)

Wheels and tires

Guideline

No interval set

2 items

Service the fork.

Front end

Factory

Factory: As printed: ○ One-time interval; column not readable (Recommended work, one-time columns are "After 20 operating hours" and "After 10 operating hours")
Perform the shock absorber service.

Rear suspension and frame

Factory

Factory: As printed: ○ One-time interval; column not readable (Recommended work, one-time columns are "After 20 operating hours" and "After 10 operating hours")

Guideline lines: Intervals here are general guidelines for the machine's era and layout, compiled for this app. They are not factory manual figures. Check your workshop manual, and edit any interval in the bike's Schedule tab.