🏷️ Basic Information

Make:

KTM

Model:

450 SXS-F

Year:

2007

Vehicle Type:

Motocross Motorcycle

Chassis Code:

Likely to start with 'VBK' or similar KTM prefix, specific code not provided but crucial for parts identification.

Engine Code:

LC4, 450cc Single-Cylinder 4-Stroke (specific variant code not provided, but typically denoted by engine family and displacement).

👋 Introduction

Vehicle Segment:

High-performance, professional-grade motocross competition bike.

Target Audience:

Competitive motocross racers, advanced amateur riders, and mechanics specializing in off-road motorcycles.

Key Competitors:

Yamaha YZ450F, Honda CRF450R, Suzuki RM-Z450, Kawasaki KX450F of the same model year.

Sxs Variant Distinction:

The 'SXS-F' designation typically indicates a factory-built or enhanced version for racing, often featuring higher-spec components and tuning compared to standard models.

Engine Configuration:

Powerful 450cc single-cylinder, 4-stroke engine known for its strong mid-range and top-end power delivery.

Suspension Performance:

High-quality WP suspension components, tuned for motocross racing, offering excellent adjustability and damping control.

Chassis Design:

Lightweight and rigid chromoly steel frame, optimized for agility and rider feedback.

Race Readiness:

Designed from the ground up for competition, with emphasis on power, handling, and durability in demanding racing conditions.

📋 Manual Details

Manual Type:

Service Repair Workshop Manual

Language:

English

Format:

PDF Download

Estimated Page Count:

High (typically 300-500+ pages for comprehensive service manuals of this era and type)

📖 Manual Coverage

Engine Mechanical:

Complete teardown, inspection, repair, and reassembly of the LC4 450cc engine, including cylinder head, piston, crankshaft, connecting rod, valve train, and lubrication system.

Fuel System:

Carburetor (likely Keihin FCR) tuning, overhaul, jetting, and troubleshooting; fuel pump operation (if applicable for specific variants); fuel tank and petcock maintenance.

Ignition System:

CDI unit, ignition coil, spark plug selection and gap, stator testing, troubleshooting ignition failures.

Cooling System:

Radiator maintenance, coolant type and capacity, fan operation (if equipped), water pump inspection and repair.

Transmission And Drivetrain:

Gearbox disassembly, inspection, and repair; clutch operation, adjustment, and replacement; chain and sprocket maintenance; primary drive.

Suspension Front:

Fork leg disassembly, service, oil level and type specification, seal replacement, adjustment of compression and rebound damping.

Suspension Rear:

Shock absorber service, linkage maintenance, bearing inspection and lubrication, spring preload and damping adjustments.

Brakes Front:

Brake caliper overhaul, hydraulic system bleeding, pad inspection and replacement, rotor inspection, master cylinder service.

Brakes Rear:

Rear brake caliper overhaul, hydraulic system bleeding, pad inspection and replacement, rotor inspection, master cylinder service.

Electrical System:

Wiring diagrams, battery maintenance, lighting system (headlight, taillight, brake light), starter motor operation, troubleshooting electrical faults.

Frame And Bodywork:

Frame inspection for damage, handlebar and control component replacement, seat mounting, plastics inspection and repair/replacement.

Routine Maintenance:

Oil and filter changes, air filter cleaning/replacement, chain adjustment, tire pressure checks, brake pad wear checks, spark plug inspection.

Troubleshooting Guides:

Systematic diagnostic procedures for common issues related to starting, running, electrical systems, and handling.

Engine Rebuild:

Detailed instructions for complete engine disassembly, cleaning, measuring critical components, and reassembly with torque specifications.

Suspension Service:

Fork seal replacement, shock absorber re-valving (if applicable), bearing replacement for linkage and steering head.

Brake System Overhaul:

Bleeding procedures, caliper piston seal replacement, master cylinder rebuild.

Carburetor Rebuild And Tuning:

Step-by-step guide for carburetor cleaning, jet changes, needle adjustments, and idle speed settings.

Wheel And Tire Service:

Spoke tightening, rim strip replacement, tire mounting and balancing.

Diagnostic Capabilities:

Advanced diagnostics for engine performance issues, electrical faults, and suspension tuning.

Component Specifications:

Detailed torque specifications for all fasteners, bearing clearances, piston ring end gap, valve lash (if adjustable).

Repair Techniques:

Professional repair techniques and best practices for KTM motocross bikes.

Parts Diagrams:

Exploded view diagrams for all major assemblies, aiding in identification and ordering of parts.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely to be text-searchable if properly created.

Printability:

Printable, allowing for physical copies.

Image Resolution:

Expected to be high-resolution for clear diagrams and text.

Physical Binding:

N/A (Digital PDF download)

Physical Paper:

N/A (Digital PDF download)

⚙️ Engine Specifications

Engine Type:

Single-cylinder, 4-stroke, SOHC (Single Overhead Camshaft), 4-valve

Displacement:

449.3 cc (approximate, specific bore/stroke required for exact value)

Bore X Stroke:

Specifications vary by precise LC4 variant, but typically around 95 mm x 63.4 mm.

Compression Ratio:

Typically in the range of 11.0:1 to 12.5:1 for this era.

Cooling System:

Liquid-cooled

Horsepower Estimated:

Likely in the range of 50-55 HP at the crank, depending on factory tuning.

Torque Estimated:

Strong mid-range torque, crucial for motocross acceleration.

Carburetor Model:

Keihin FCR 41 MX (common for this application)

Fuel Type:

Unleaded gasoline, premium octane (95 RON or higher recommended)

Oil Capacity Engine Trans:

KTM often uses a shared engine/transmission oil sump. Capacity typically around 1.0-1.2 liters. Specific oil type and part number crucial for maintenance.

🔧 Transmission

Transmission Type:

5-speed constant mesh

Transmission Ratios:

Specific gear ratios are detailed within the manual and critical for performance tuning.

Clutch Type:

Hydraulically operated multi-plate wet clutch

Clutch Fluid:

Typically DOT 4 brake fluid or specific hydraulic mineral oil (manual will specify exact type and brand).

Final Drive:

Chain drive, O-ring or X-ring sealed chain recommended. Specific sprocket ratios for racing applications are common.

📐 Dimensions

Wheelbase:

Approximately 1475-1500 mm (specific value required from manual).

Seat Height:

Typically around 950-970 mm (unladen).

Ground Clearance:

Substantial, designed for off-road use, typically over 300 mm.

Dry Weight:

Around 100-105 kg (typical for a 450cc motocross bike of this era).

Fuel Tank Capacity:

Approximately 7-9 liters (standard motocross tank size).

Front Tire Size:

Typically 80/100-21

Rear Tire Size:

Typically 110/90-19 or 120/90-19

Wheel Bolt Pattern:

N/A (motorcycle hub mounting)

🛡️ Safety Features

Crash Safety Ratings:

N/A (motorcycles are not subject to automotive crash test ratings like NCAP).

Braking System:

Hydraulic disc brakes front and rear. Specific caliper and rotor sizes are detailed in the manual.

Frame Strength:

Chromoly steel frame designed for impact resistance in off-road conditions.

Ergonomics:

Designed for rider control and stability during aggressive riding.

💡 Technology Features

Instrumentation:

Basic digital hour meter and indicator lights. No complex infotainment systems on a pure motocross bike of this era.

Traction Control:

N/A (No electronic rider aids like traction control or ABS on this competition model).

Bluetooth Connectivity:

N/A

🔧 Maintenance

Oil Change Interval:

Frequent. Typically every 5-10 hours of hard riding or 15-20 hours for general use. Manual will provide exact recommendation.

Air Filter Cleaning:

After every few rides, or more frequently in dusty conditions. Manual will detail cleaning and re-oiling procedure.

Valve Clearance Check:

Critical for performance and engine longevity. Intervals are typically every 20-30 hours of riding. Specific checking and adjustment procedures are detailed.

Chain Lubrication Adjustment:

Lubricate every ride, adjust tension as needed. Excessive slack or tightness can cause damage.

Spark Plug Replacement:

Inspect at regular intervals, replace as needed or per manual recommendation (e.g., every 20-40 hours).

Engine Oil Type:

High-quality 4-stroke motorcycle oil, likely SAE 10W-40 or 10W-50, meeting JASO MA/MA2 standards. Manual will specify exact grade and API rating.

Coolant Type:

Ethylene glycol-based antifreeze with corrosion inhibitors, typically a 50/50 mix with distilled water. Manual will specify specific type and concentration.

Fork Oil Type:

Specific suspension fluid, often SAE 5W or 7.5W. Manual will specify viscosity and exact fill levels for front forks.

Brake Fluid Type:

DOT 4 brake fluid for clutch and brake systems. Manual will confirm.

Engine Wear Points:

Common wear items include piston rings, valve guides, and cam chains due to high-stress operation. Regular inspection is key.

Clutch Slave Cylinder Leaks:

Occasional leaks from the clutch slave cylinder can occur, requiring seal replacement.

Suspension Seals:

Fork seals and shock seals are consumables and require periodic replacement due to the nature of motocross riding.

Carburetor Jetting:

Carburetor jetting is crucial for optimal performance and can require adjustments based on altitude, temperature, and modifications.

📚 Vehicle History

Ktm Motorsport Focus:

KTM has a deep and successful heritage in off-road racing, particularly motocross and enduro, which directly influences the design and performance of models like the 450 SXS-F.

Lc4 Engine Lineage:

The LC4 engine family is a long-standing and highly regarded platform for KTM, evolving significantly over the years to improve performance, reliability, and weight.

2007 Model Updates:

The 2007 models often represented refinements over previous years, potentially including updated suspension settings, revised engine mapping (carburetor jetting), and chassis tweaks based on racing feedback.

Manufacturing Location:

Austria (KTM's primary manufacturing base)

Sxs Variant Purpose:

The SXS-F designation signifies a factory-prepared or 'works' replica model, often sold in limited numbers and intended for direct competition or serious enthusiasts seeking a higher level of performance out-of-the-box.

🏆 Awards & Recognition

Motocross Championships:

KTM's SXS-F models and their predecessors have a strong record of success in national and international motocross championships, indicating their performance capabilities.

Magazine Reviews:

This model likely received positive reviews from motorcycle magazines of the era for its power, handling, and race-ready features.

Emissions Certification:

N/A (Competition off-road motorcycles are generally not subject to strict emissions regulations in the same way as street-legal vehicles).