🏷️ Basic Information

Make:

KTM

Model:

450 SX

Type:

All-Terrain Vehicle (ATV)

Year:

2009

Sub Model:

SX (Sport Cross Country)

👋 Introduction

Product Category:

Performance Off-Road ATV Parts

Target User:

KTM 450 SX ATV owners, mechanics, and parts suppliers.

Value Proposition:

Provides essential OEM part identification and numbers for accurate maintenance and repair, crucial for preserving the performance of a high-performance off-road vehicle.

Illustrated Diagrams:

Clear, exploded view diagrams that visually break down complex assemblies.

Part Number Listing:

Essential for sourcing correct, genuine replacement parts.

Assembly Guidance:

Facilitates correct reassembly of components after maintenance or repair.

📋 Manual Details

Primary Coverage:

Exploded Parts Diagrams, Part Numbers

Secondary Coverage:

Disassembly, Repair, Assembly Guidance

Estimated Page Count:

Varies based on specific edition, typically 100-300 pages for a comprehensive parts catalog of this nature.

Type:

OEM Replacement Parts Manual / Parts Catalog

Language:

English

Format:

PDF Download

📖 Manual Coverage

Powertrain:

Engine (450cc), Transmission, Drivetrain (Chain/Sprockets), Clutch Assembly

Chassis And Suspension:

Frame, Front Suspension (A-Arms, Shocks, Steering), Rear Suspension (Swingarm, Shock, Linkage), Wheels, Tires

Brakes:

Front and Rear Brake Calipers, Rotors, Master Cylinders, Lines, Levers/Pedals

Electrical System:

Ignition System, CDI Unit, Wiring Harness, Battery, Starter Motor, Lighting (if applicable)

Fuel System:

Carburetor Assembly, Fuel Tank, Fuel Lines, Fuel Filter

Cooling System:

Radiator, Cooling Fan, Hoses, Coolant

Exhaust System:

Exhaust Pipe, Muffler, Heat Shields

Bodywork And Controls:

Plastic Body Panels (fenders, shrouds), Seat, Handlebars, Footpegs, Levers, Cables

Component Identification:

Detailed identification of every component via exploded diagrams.

Part Number Lookup:

Comprehensive listing of all OEM part numbers for ordering replacements.

Assembly Disassembly Guidance:

Visual aids and part orderings assist in proper disassembly and reassembly sequences.

Level Of Detail:

Highly detailed for parts identification and placement, enabling accurate replacement and repair.

Diagnostic Capability:

Indirectly aids diagnostics by identifying correct components for replacement. Does not include troubleshooting steps.

Repair Scope:

Focuses on parts replacement rather than in-depth repair procedures or specifications.

📊 Manual Specifications

Digital Format:

PDF (Portable Document Format)

Searchability:

Typically searchable if the PDF is text-based, allowing for quick part number or component name searches.

Print Quality:

Depends on the source, but generally designed for clear printing of diagrams and text.

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Single-cylinder, 4-stroke, Liquid-cooled, DOHC

Displacement:

Approximately 450cc (specific bore/stroke for 2009 model may vary slightly)

Bore X Stroke:

Likely around 95 mm x 63.4 mm (refer to specific service manual for exact figures)

Compression Ratio:

Typically in the range of 11.1:1 to 12.5:1 for performance engines of this era.

Horsepower Estimate:

Estimated 40-50 HP (at crankshaft), specific rating varies.

Torque Estimate:

Estimated 35-40 lb-ft (at crankshaft), specific rating varies.

Fuel Delivery:

Carbureted (likely Keihin FCR series, e.g., FCR-MX)

Carburetor Size:

Likely 40mm or 41mm

Fuel Type:

Unleaded Gasoline (Octane rating specified in owner's manual, typically 91+)

Ignition Type:

Digital CDI with adjustable ignition advance

Cooling Method:

Liquid Cooling

Oil Type:

Typically SAE 10W-50 or 10W-40 motorcycle-specific synthetic oil with JASO MA/MA2 certification.

Oil Capacity:

Approx. 1.2 - 1.5 Liters (including filter change, refer to manual for exact capacity)

🔧 Transmission

Type:

5-speed manual gearbox with wet multi-disc clutch

Clutch Type:

Hydraulically operated, wet multi-plate

Gear Ratios:

Specific ratios will be detailed in a full service manual, but designed for aggressive off-road performance.

Final Drive:

Chain drive (DID or similar quality), typically 520 pitch.

Fluid Type:

Engine oil (shared with engine lubrication, see engine oil specs)

📐 Dimensions

Wheelbase:

Approx. 1280 mm (50.4 inches)

Seat Height:

Approx. 830 mm (32.7 inches)

Ground Clearance:

Approx. 260 mm (10.2 inches)

Dry Weight:

Approx. 170 kg (375 lbs)

Curb Weight:

Not typically published for ATVs, but would be dry weight plus fluids.

Tank Capacity:

Approx. 8 Liters (2.1 Gallons)

🛡️ Safety Features

Atv Safety:

As an off-road vehicle, safety is highly dependent on rider skill, protective gear, and adherence to safe operating practices. No crash test ratings apply.

Brakes:

Hydraulic disc brakes front and rear for strong stopping power.

Throttle Limiter:

Not typically present on performance SX models, but may have been an option or regional variation.

Frame Construction:

Robust steel or aluminum frame designed for off-road abuse.

Handlebar Protection:

Often includes knuckle guards or handguards.

Footpegs:

Aggressive grip footpegs for secure footing.

💡 Technology Features

Features:

N/A. Performance ATVs of this era focus on pure riding capability, not infotainment systems.

Features:

N/A. Focus is on rider control and mechanicals.

Features:

N/A. No electronic connectivity features.

🔧 Maintenance

Oil Change Interval:

Recommended every 15-25 hours of operation or seasonally, depending on usage severity. Consult specific service manual for precise intervals.

Air Filter Cleaning:

Frequent cleaning recommended, ideally after every few rides or as needed based on dust conditions.

Spark Plug Replacement:

Typically every 50-100 hours of operation or as needed based on performance.

Chain Maintenance:

Regular cleaning, lubrication, and tension adjustment required, every 10-15 hours.

Valve Clearance Check:

Initial check often around 10-20 hours, then every 30-50 hours. Crucial for maintaining performance.

Engine Oil Specification:

SAE 10W-40 or 10W-50, API SG/SH/SJ/SL or higher, JASO MA/MA2 certified synthetic motorcycle oil.

Coolant Specification:

High-quality motorcycle coolant with anti-corrosion additives. Typically a 50/50 mix of distilled water and ethylene glycol-based coolant.

Brake Fluid Specification:

DOT 4 hydraulic brake fluid.

Common Wear Items:

Brake pads, chains, sprockets, wheel bearings, steering stem bearings, control cables, and plastic body panels are common wear items in aggressive riding.

Performance Tuning:

While not a 'known issue', owners often seek aftermarket exhaust, intake, or ECU tuning for increased performance. This manual is essential for ensuring OEM part integrity during such modifications.

Carburetor Maintenance:

Carburetors, particularly after extended periods of use or sitting, may require cleaning and jetting adjustments for optimal performance. This manual helps identify the correct carburetor components.

📚 Vehicle History

Ktm Legacy:

KTM has a strong heritage in off-road motorsports, particularly in motocross and enduro, known for producing high-performance, race-oriented machines.

Sx Lineup:

The SX line represents KTM's premier motocross and cross-country racing ATVs, emphasizing power, handling, and lightweight construction. The 450 SX is a staple in this category.

Manufacturing Origin:

Typically manufactured in Austria, though some components may be sourced globally.

Updates For 2009:

The 2009 model likely received updates based on racing feedback, possibly including engine tuning, suspension refinements, or chassis geometry adjustments compared to previous years.

🏆 Awards & Recognition

Atv Reviews:

KTM ATVs, including the 450 SX, have historically received high marks in performance reviews from specialized motorsports publications for their power, handling, and race-ready design.

Racing Success:

KTM's factory racing efforts and the production-based SX models have achieved numerous victories in professional motocross, supercross, and off-road racing series.