KTM 85 SX 19/16 2017 - User Manual

Questions and Answers

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Tammy ZimmermanAug 19, 2025
Why does my KTM 85 SX 19/16 2017 Motorcycle engine have no power?
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  joshuawatkinsSep 12, 2025
  If your KTM Motorcycle engine has too little power, several factors could be the cause. Begin by checking for interruptions in the fuel feed, such as a blocked fuel tank breather or a dirty fuel tap; also, check and set the carburetor components. A very dirty air filter can also restrict power, so clean the air filter and air filter box. Inspect the exhaust system for leaks or deformation, and consider changing the glass fiber yarn filling of the main silencer. Additionally, a fault in the ignition system can lead to power loss, so check the ignition system and adjust the ignition if needed. Lastly, a damaged membrane or reed valve housing can reduce engine power, so inspect these components.
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Pamela BradfordAug 22, 2025
How to fix KTM 85 SX 19/16 2017 Motorcycle engine that won't idle?
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  travisburnsAug 22, 2025
  If your KTM Motorcycle engine has no idle, several things could be wrong. A blocked idling jet is a common cause, so you should check and set the carburetor components. Distorted adjusting screws on the carburetor can also prevent proper idling; in this case, adjust the idle speed. A defective spark plug can cause idling issues, so replace the spark plug. Finally, a defective ignition system can be the culprit, so check the ignition coil and the spark plug connector.
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Linda MercadoAug 25, 2025
What to do if my KTM 85 SX 19/16 2017 engine overheats?
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  ddunnAug 26, 2025
  If your KTM Motorcycle engine overheats, there are several potential causes. First, check the cooling system for leaks and ensure the coolant level is correct. Insufficient air stream can also cause overheating, so switch off the engine when standing. Dirty radiator fins can impede cooling, so clean the radiator fins. Foam formation in the cooling system can also lead to overheating; in this case, drain and refill the coolant. A damaged cylinder head or cylinder head gasket can cause overheating, so inspect these components. A bent radiator hose can restrict coolant flow, so replace the radiator hose if necessary. Finally, an incorrect ignition point due to a loose stator can cause overheating, so adjust the ignition.
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marissavelazquezAug 28, 2025
What to do if KTM 85 SX 19/16 2017 engine stalls?
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  jennifer30Aug 28, 2025
  If your KTM Motorcycle engine stalls or pops into the carburetor, a lack of fuel could be the cause. Ensure the fuel tap is in the ON position and refuel if necessary. The engine taking in bad air can also lead to these issues, so check the intake flange and carburetor for tightness. A loose or oxidized connector or ignition coil can also cause these problems, so clean the connector and treat it with contact spray.
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Natasha UnderwoodAug 31, 2025
Why KTM 85 SX 19/16 2017 Motorcycle engine won't rev?
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  Lisa CharlesAug 31, 2025
  If your KTM Motorcycle engine does not speed up, several issues might be responsible. A carburetor running over because of a dirty or worn float needle can cause this problem, so check and set the carburetor components. Loose carburetor jets can also prevent the engine from speeding up, so check and set the carburetor components. A fault in the ignition system can also be the reason, so check the ignition system and adjust the ignition.
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William CardenasSep 3, 2025
Why is my KTM Motorcycle blowing white smoke?
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  Heidi EdwardsSep 3, 2025
  If your KTM Motorcycle emits white smoke (steam) in the exhaust gas, a damaged cylinder head or cylinder head gasket could be the cause. In this case, check the cylinder head and cylinder head gasket.
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Lauren McdanielSep 6, 2025
Why is gear oil leaking from KTM Motorcycle vent hose?
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  rachelmooreSep 6, 2025
  If gear oil exits at the vent hose of your KTM Motorcycle, it could be due to too much gear oil being added. Check the gear oil level.
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Donald BrockSep 9, 2025
How to fix water in gear oil of KTM 85 SX 19/16 2017?
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  Frederick VegaSep 9, 2025
  If there is water in the gear oil of your KTM Motorcycle, it could be due to a damaged shaft seal ring or water pump. Check the shaft seal ring and water pump.
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Richard PerezSep 12, 2025
What causes KTM Motorcycle engine to overheat?
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  Kevin WoodsSep 12, 2025
  If your KTM Motorcycle engine overheats, it could be due to a damaged cylinder head or cylinder head gasket, so check them. Another possible cause is a bent radiator hose, which should be replaced. Finally, an incorrect ignition point due to a loose stator can also cause overheating, so adjust the ignition.
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Richard LeeNov 15, 2025
Why my KTM 85 SX 19/16 2017 engine turns over but won't start?
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  Tyler HuertaNov 15, 2025
  If your KTM Motorcycle engine turns but doesn't start, several factors could be at play. First, ensure you're following the correct start procedure. If the motorcycle has been sitting unused for an extended period, old fuel in the float chamber might be the issue; in this case, you should empty the carburetor float chamber. Check for any interruptions in the fuel feed by inspecting the fuel tank breather and cleaning the fuel tap. Also, make sure to check and, if needed, adjust or clean the carburetor components. If the spark plug is oily or wet, clean and dry it, or replace it if necessary. Confirm that the spark plug electrode gap is correctly set to 0.60 mm (0.0236 in). Inspect the ignition system and adjust the ignition if there's a fault. Check the kill switch for any defects. Lastly,...

Summary

Safety and Operation

General Safety Advice

General safety advice, risk levels, and warnings.

Controls Overview

Description of major controls like levers, fuel tap, and shifter.

Riding Instructions

Pre-ride checks, starting, riding, braking, and parking procedures.

Service Schedule and Chassis Tuning

Service Schedule Overview

Lists required and recommended maintenance tasks at intervals.

Chassis Setup and Adjustments

Adjusting chassis, sag, and fork settings based on rider weight.

Shock Absorber Tuning

Procedures for adjusting shock absorber damping and sag.

Maintenance and Repairs

Fork and Steering Head Bearing Service

Procedures for fork leg and steering head bearing maintenance.

Brake System Maintenance

Maintenance for brake fluid, discs, and linings.

Wheels, Tires, and Cooling System

Maintenance for wheels, tires, and the cooling system.

Engine Tuning, Troubleshooting, and Data

Engine Tuning (Carburetor)

How to adjust carburetor idle speed and tuning data.

Troubleshooting Engine Issues

Identifies common engine faults, causes, and solutions.

Technical Specifications

Key technical details, capacities, and torques.

KTM 85 SX 19/16 2017 Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	84.9 cm³
Starter	Kickstarter
Transmission	6-speed
Clutch	Wet, multi-disc clutch, Formula hydraulics
Front Wheel	1.60 x 19"
Rear Wheel	2.15 x 16"
Seat Height	890 mm
Cooling System	Liquid cooled
Bore x Stroke	47 mm x 48.95 mm
Frame	Central tube frame, chrome molybdenum steel
Front Suspension	WP upside-down Ø 43 mm
Rear Suspension	WP monoshock
Front Brake	Disc brake
Rear Brake	Disc brake
Wheelbase	1, 290 mm ± 10 mm
Tank Capacity	5.2 liters