KTM 350 SX-F 2018 - User Manual

Questions and Answers

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Melissa FarmerJul 30, 2025
What to do if KTM Motorcycle engine turns but does not start?
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  Robert DavisJul 30, 2025
  If the engine of your KTM Motorcycle turns over but fails to start, first ensure the plug-in connection of the fuel hose is securely connected. Other potential causes include a clogged fuel screen in the fuel hose connection, which requires changing the fuel screen, or an incorrectly set idle speed, which needs adjustment. A spark plug that's oily or wet should be cleaned and dried, or replaced if necessary. Also, check the spark plug electrode distance (plug gap) and adjust it to the guideline of 0.8 mm (0.031 in) if it is too wide. Finally, inspect the wiring harness for frayed short circuit cables and the kill switch for defects, and have the fuel injection system checked for defects using the KTM diagnostics tool.
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Lisa StevensonAug 4, 2025
Why does KTM 350 SX-F 2018 Motorcycle engine has too little power?
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  Julie DanielsAug 4, 2025
  If your KTM Motorcycle engine has too little power, start by checking the air filter and air filter box and cleaning them if they are very dirty. Also, the fuel filter may be very dirty, so you should change it. Inspect the exhaust system for leaks or deformation. If the main silencer has too little glass fiber yarn filling, replace it. Finally, the valve clearance may be too little, so have it adjusted.
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Nathaniel RobertsAug 10, 2025
Why KTM Motorcycle has high oil consumption?
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  uolsonAug 10, 2025
  High oil consumption in your KTM Motorcycle can be attributed to several factors. First, ensure that the engine vent hose is routed without any bends, and replace it if necessary. Check the engine oil level; if it's too high, adjust accordingly. If the engine oil is too thin (low viscosity), change the engine oil and oil filter, and clean the oil screen. Lastly, worn piston or cylinder can also cause high oil consumption, requiring a measurement of the piston/cylinder mounting clearance.
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Steven MunozAug 16, 2025
How to fix KTM Motorcycle when the engine does not turn when the starter button is pressed?
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  Mrs. Alexandria JonesAug 16, 2025
  If your KTM Motorcycle engine does not turn when you press the starter button, the issue might stem from a few causes. You should first ensure that you are following the correct start procedure. A discharged battery is a common culprit; in this case, recharge the battery and check the charging voltage, open-circuit current and the stator winding of the alternator. Additionally, inspect the main fuse and replace it if it's blown. The starter relay or the starter motor itself could be defective, requiring a check of each component.
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jfoleyAug 22, 2025
What causes KTM 350 SX-F 2018 engine to overheat?
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  Michael BallAug 23, 2025
  If your KTM Motorcycle engine overheats, start by checking the cooling system for leakage and verifying the coolant level. If the coolant level is too low, add coolant. Ensure there's enough air stream; switch off the engine when standing. Clean the radiator fins if they are very dirty. If there is foam formation in the cooling system, drain and refill the coolant. Finally, inspect the radiator hose and replace it if it's bent.

Summary

Safety Advice

Intended Use

Defines the intended use of the vehicle and its limitations.

Safe Operation

Guidelines for safe riding and maintenance.

Controls

Preparing for Use

Advice on First Use

Initial advice and checks before riding for the first time.

Running In the Engine

Riding Instructions

Pre-Ride Checks

Essential checks before operating the vehicle.

Starting the Engine

Procedures for starting the motorcycle's engine.

Applying Brakes

Proper braking techniques and warnings.

Refueling

Service Schedule

Required Work

List of maintenance tasks at different intervals.

Tuning the Chassis

Basic Chassis Setting

Adjusting suspension based on rider weight.

Fork Air Pressure Adjustment

Adjusting the air pressure in the front fork.

Shock Absorber Adjustments

Adjusting compression and rebound damping on the shock absorber.

Brake System

Checking Front Brake Fluid Level

Changing Front Brake Linings

Checking Rear Brake Fluid Level

Tuning the Engine

Adjusting Throttle Cable Play

Setting Throttle Response Map

Changing the engine's throttle response map.

Service Work on the Engine

Checking Engine Oil Level

Changing Engine Oil and Filter

Procedures for oil and filter change, cleaning screen.

Troubleshooting

KTM 350 SX-F 2018 Specifications

General

Engine Type	Single cylinder, 4-stroke
Displacement	349.7 cc
Transmission	5-speed
Ignition	Keihin EMS
Rear Suspension	WP XACT Monoshock
Starter	Electric starter
Front Tire	80/100-21
Rear Tire	110/90-19
Bore x Stroke	88 mm x 57.5 mm
Seat Height	950 mm
Final Drive	520 chain
Front Suspension	WP USD Xact, Ø 48 mm
Front Brake	260 mm Disc
Rear Brake	Disc brake, Ø 220 mm
Fuel System	Keihin EFI, 44 mm Throttle Body
Fuel Tank Capacity	7 l (1.85 gal)
Frame	Chromium-molybdenum steel