KTM 505 SX ATV User Manual

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OWNER'S MANUAL 2010

450 SX ATV

505 SX ATV

Art. no. 3211488en

Table of Contents

Questions and Answers:

E
ericcarterAug 8, 2025
Why won't my KTM Offroad Vehicle engine start?
- J
  jay98Aug 9, 2025
  If your KTM Offroad Vehicle's engine turns over but doesn't start, several factors could be at play. Start by ensuring you're following the correct starting procedure. A common issue is fuel supply interruption; check the fuel tank breather and clean the fuel tap. Inspect and adjust the carburetor components as well. Also, a spark plug that's oily or wet can prevent ignition; clean and dry it, or replace if needed. Make sure the spark plug electrode gap is correctly set to 0.7 mm (0.028 in). Finally, inspect the kill switch/emergency OFF switch wiring and electrical system for faults.
J
Jared GarciaAug 14, 2025
What to do if KTM Offroad Vehicle engine turns but does not start and spark plug is oily?
- R
  Ryan RichardsAug 14, 2025
  If the engine of your KTM Offroad Vehicle turns but fails to start, and the spark plug is oily or wet, you should clean and dry the spark plug. If cleaning doesn't resolve the issue, consider replacing the spark plug.
T
Tiffany FoxAug 20, 2025
What to do if KTM Offroad Vehicle engine turns but does not start and socket connector is oxidized?
- S
  steelenathanAug 20, 2025
  If your KTM Offroad Vehicle engine turns but does not start, and you suspect the socket connector of the CDI control device, pulse generator or ignition coil is oxidized, clean the plug-in connector and treat it with contact spray.
S
Samuel SimmonsAug 27, 2025
What to do if KTM 505 SX ATV engine turns but does not start and kill switch is faulty?
- S
  Sandra HerringAug 27, 2025
  If your KTM Offroad Vehicle's engine turns over but fails to start, and you suspect the kill switch/emergency OFF switch with rip cord is faulty, check the wiring harness with a visual inspection and check the electrical system.
E
Erin WhiteSep 1, 2025
Why KTM 505 SX ATV engine turns but does not start when throttle lever activated?
- P
  Phillip GillSep 1, 2025
  If your KTM Offroad Vehicle's engine turns but doesn't start, ensure that you are not activating the throttle lever during the starting procedure. Refer to the starting instructions for the correct procedure.

KTM 505 SX ATV Specifications

General

Brand	KTM
Model	505 SX ATV
Category	Offroad Vehicle
Language	English

Summary

Important Information

Maintenance and Service

Rider Training and Safety

Importance of rider training and adherence to warnings for safe operation.

Risk Grades and Manual Importance

General Tips for Operation

First Use and Safety Advice

Essential advice for first-time use, including safety precautions and rider training.

Engine Running-In Procedure

Riding Instructions

Pre-Ride Checks

Essential checks to perform before operating the vehicle.

Starting and Starting Up

Procedures and safety measures for starting the engine and the vehicle.

Riding Techniques

Service Schedule

Workshop Maintenance Tasks

List of maintenance tasks to be performed by an authorized KTM workshop.

Rider Maintenance Tasks

Routine checks and maintenance tasks for the owner to perform.

Maintenance on Chassis and Engine

Chassis Settings Adjustment

Basic information and procedures for adjusting chassis settings like suspension.

Shock Absorber Adjustments

Detailed instructions for adjusting front and rear shock absorber damping and preload.

Wheel Alignment Checks

Procedures for checking and adjusting toe, camber, and toe width.

Chain Maintenance

Brake System Maintenance

Procedures for checking and maintaining brake discs, fluid levels, and linings.

Tire Maintenance

Battery Maintenance

Electrical System Components

Air Filter Maintenance

Carburetor Adjustments

Engine Oil and Filter Service

Procedures for changing engine oil, oil filter, and cleaning oil screen.

Troubleshooting

Engine Starting Issues

Possible causes and actions when the engine fails to start or crank.

Engine Performance Problems

Troubleshooting for issues like lack of acceleration, no idle, stalling, overheating, and low power.

High Oil Consumption and Battery Issues

Cleaning the Vehicle

Storage

Vehicle Storage Procedures

Technical Data - Engine

Engine Specifications

Detailed specifications including design, displacement, bore, stroke, and ratios.

Engine Oil and Coolant Capacity

Engine Tightening Torques

Table of tightening torques for various engine components.

Technical Data - Carburetor

Carburetor Specifications

Technical Data - Chassis

Chassis Specifications

Details on frame, suspension, dimensions, and weight.

Brake and Tire Specifications

Chassis Tightening Torques

Table of tightening torques for various chassis components.

Technical Data - Front Shock Absorber

Front Shock Absorber Specifications

Details on damping, preload, spring rates, dimensions, and gas pressure.

Technical Data - Rear Shock Absorber

Rear Shock Absorber Specifications

Details on damping, preload, spring rates, dimensions, and gas pressure.

Operating Substances

Brake Fluid and Coolant

Engine Oil Specifications

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