KTM 50 SX 2020 Maintenance Schedule
The 2020 KTM 50 SX maintenance schedule below covers the manufacturer's recommended service intervals for general maintenance, tires, spark plugs, oil, brake fluid, drive chain maintenance, coolant and air filter. Intervals are shown in kilometres by default and can be switched to miles.
50ccEngine size
45Maintenance items
Official manufacturer manual
Sourced from KTM Owner's Manual (official PDF content, mirrored via authorized KTM dealer ktmshop.se): ktmshop.se
Full schedule
| Task | Interval | Difficulty | Notes |
|---|---|---|---|
| Change the foot brake cylinder sealing cup | Every 20 operating hours | Moderate | Change the foot brake cylinder sealing cup |
| Check the frame | Every 20 operating hours | Easy | Check the frame |
| Check the link fork | Every 20 operating hours | Easy | Check the link fork |
| Check the fork bearing for play | Every 20 operating hours | Moderate | Check the fork bearing for play |
| Check the heim joint for play | Every 20 operating hours | Advanced | Check the heim joint for play |
| Check the wheel bearing for play | Every 20 operating hours | Advanced | Check the wheel bearing for play |
| Check the wheel hubs | Every 20 operating hours | Easy | Check the wheel hubs |
| Change the spark plug and spark plug connector | Every 20 operating hours | Easy | Change the spark plug and spark plug connector |
| Change the gear oil | Every 40 operating hours | Easy | Change the gear oil |
| Check the gear oil level | Every 20 operating hours | Easy | Check the gear oil level |
| Change the glass fiber yarn filling of the main silencer | Every 20 operating hours | Easy | Change the glass fiber yarn filling of the main silencer |
| Perform the shock absorber service | Every 80 operating hours | Advanced | Perform the shock absorber service |
| Check the clutch setting | Every 20 operating hours | Moderate | Check the clutch setting |
| Change the front brake fluid | Every 20 operating hours | Moderate | Change the front brake fluid |
| Change the rear brake fluid | Every 20 operating hours | Moderate | Change the rear brake fluid |
| Grease the steering head bearing | Every 20 operating hours | Easy | Grease the steering head bearing |
| Check/adjust the carburetor components | Every 20 operating hours | Moderate | Check/adjust the carburetor components |
| Perform minor engine service (check the cylinder and piston; check the inlet membrane) | Every 12 months · Every 80 operating hours | Advanced | Perform minor engine service (check the cylinder and piston; check the inlet membrane) |
| Perform major engine service including removing and installing the engine (change the piston, connecting rod, conrod bearing, crank pin; check the transmission; change the crankshaft bearing and all engine bearings) | Every 80 operating hours | Expert | Perform major engine service including removing and installing the engine (change the piston, connecting rod, conrod bearing, crank pin; check the transmission; change the crankshaft bearing and all engine bearings) |
| Check the front brake linings | Every 20 operating hours | Easy | Check the front brake linings |
| Check the brake linings of the rear brake | Every 20 operating hours | Easy | Check the brake linings of the rear brake |
| Check the brake discs | Every 20 operating hours | Easy | Check the brake discs |
| Check the brake lines for damage and leakage | Every 20 operating hours | Easy | Check the brake lines for damage and leakage |
| Check the rear brake fluid level | Every 20 operating hours | Moderate | Check the rear brake fluid level |
| Check the free travel of the foot brake lever | Every 20 operating hours | Easy | Check the free travel of the foot brake lever |
| Check the tire condition | Every 20 operating hours | Easy | Check the tire condition |
| Check tire pressure | Every 20 operating hours | Easy | Check tire pressure |
| Check the rim run-out | Every 20 operating hours | Easy | Check the rim run-out |
| Check the spoke tension | Every 20 operating hours | Easy | Check the spoke tension |
| Check the chain, rear sprocket, engine sprocket, and chain guide | Every 20 operating hours | Easy | Check the chain, rear sprocket, engine sprocket, and chain guide |
| Check the chain tension | Every 20 operating hours | Easy | Check the chain tension |
| Grease all moving parts (e.g., hand lever, chain, ...) and check for smooth operation | Every 20 operating hours | Easy | Grease all moving parts (e.g., hand lever, chain, ...) and check for smooth operation |
| Check the front brake fluid level | Every 20 operating hours | Moderate | Check the front brake fluid level |
| Check the play of the handbrake lever | Every 20 operating hours | Easy | Check the play of the handbrake lever |
| Check the steering head bearing play | Every 20 operating hours | Advanced | Check the steering head bearing play |
| Check all hoses (e.g. fuel, cooling, bleeder, drainage, etc.) and sleeves for cracking, leaks, and incorrect routing | Every 20 operating hours | Easy | Check all hoses (e.g. fuel, cooling, bleeder, drainage, etc.) and sleeves for cracking, leaks, and incorrect routing |
| Check the antifreeze and coolant level | Every 20 operating hours | Easy | Check the antifreeze and coolant level |
| Check the cables for damage and routing without sharp bends | Every 20 operating hours | Easy | Check the cables for damage and routing without sharp bends |
| Check that the throttle cables are undamaged, routed without sharp bends, and set correctly | Every 20 operating hours | Easy | Check that the throttle cables are undamaged, routed without sharp bends, and set correctly |
| Clean the air filter and air filter box | Every 20 operating hours | Easy | Clean the air filter and air filter box |
| Service the fork | Every 40 operating hours | Advanced | Service the fork |
| Check the tightness of the easily accessible, safety-relevant screws and nuts | Every 20 operating hours | Easy | Check the tightness of the easily accessible, safety-relevant screws and nuts |
| Check the idle speed | Every 20 operating hours | Easy | Check the idle speed |
| Final check: check the vehicle for safe operation and take a test ride | Every 20 operating hours | Easy | Final check: check the vehicle for safe operation and take a test ride |
| Make a service entry in the KTM Dealer.net | Every 20 operating hours | Easy | Make a service entry in the KTM Dealer.net |
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Easy: basic tools, straightforward Easy–Moderate: varies by task — somewhere between the two Moderate: some mechanical know-how helps Advanced: specialized tools/skill, still DIY-doable Expert: significant experience required Professional: dealer or shop recommended
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