SERVICE SCHEDULE
137
34.1
Important maintenance work that must be done in an authorized KTM workshop
S20A
S40A
Engine
Change the gear oil. (
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Check spark plug and replace if required.
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Clean spark plug connectors and check for tightness.
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Check engine mounting screws for tightness.
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Check the clutch engagement speed. (
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Carburetor
Check intake flange and carburetor connection boot for cracks and leakage.
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Check idle.
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Check vent hoses for damage and routing without sharp bends.
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Attachments
Check the cooling system for leakage.
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Check the antifreeze and coolant level. (
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Check exhaust system for leakage and looseness.
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Check throttle cables for damage, smooth operation and routing without sharp bends.
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Clean the air filter. (
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Brakes
Check the front brake linings. (
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Check the rear brake linings. (
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Check the brake discs. (
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Check the front brake fluid level. (
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Check the rear brake fluid level. (
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Check brake lines for damage and leakage.
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Check the play of the hand brake lever. (
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Check the free travel of the foot brake lever. (
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Check the function of the brake system.
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Check screws and guide bolts of brake system for tightness.
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Chassis
Check shock absorber and fork for leakage and functioning.
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Clean dust boots of fork legs. (
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Check swingarm bearing.
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Check play of steering head bearing. (
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Check all screws to see if they are tight.
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Wheels
Check the spoke tension. (
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Check rim run-out.
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Check the tire condition. (
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Check the tire air pressure. (
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Check the chain wear.
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Check the chain tension. (
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Clean the chain. (
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Check wheel bearing for play.
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Clean and grease adjusting screws of chain adjuster.
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S20A:
Every 20 operating hours
S40A:
Every 40 operating hours
34.2
Important maintenance work that must be done in an authorized KTM workshop (as additional order)
S20A
S40A
S80A
J1A
Check/set the carburetor components. (50 SX Junior, 50 SX Mini) (
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Check/set the carburetor components. (50 SX) (
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Check the reed valve housing, diaphragm and intake flange. (
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Check/measure the clutch. (
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Checking wear of clutch drum.
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Determine the piston/cylinder mounting clearance. (
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Check the seating of the piston pin.
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Check main bearing of the crankshaft.
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