Category:
High-performance motocross/off-road motorcycle
Segment:
Competitive motocross racing, demanding off-road riding
Rivals:
Yamaha YZ450F, Honda CRF450R, Suzuki RM-Z450, Kawasaki KX450F
Performance Focus:
Emphasis on lightweight design, powerful single-cylinder engine, and agile handling.
Target Audience:
Motocross racers and serious off-road enthusiasts seeking competitive edge and robust performance.
Engine Mechanical:
Complete engine disassembly, assembly, inspection, and repair of all internal components (pistons, connecting rods, crankshaft, camshafts, valves, valve seats, timing components, oil pump, etc.)
Engine Electrical:
Ignition system, CDI unit, spark plug, stator, wiring diagrams related to engine operation.
Fuel System:
Carburetor (likely Keihin FCR type for this era) disassembly, cleaning, adjustment, jetting; fuel tank and petcock inspection.
Lubrication System:
Oil pump, oil filter, oil passages, oil change procedures, oil capacity.
Cooling System:
Radiator, hoses, coolant, thermostat (if applicable), water pump inspection and service.
Exhaust System:
Muffler, header pipe inspection and service.
Maintenance:
Regular service intervals, oil changes, filter replacements, spark plug checks, valve clearance adjustments, timing chain inspection.
Troubleshooting:
Diagnostic flowcharts for common engine problems, performance issues, starting difficulties, unusual noises.
Repair:
Detailed step-by-step instructions for component replacement, overhauls, and rebuilds.
Assembly:
Torque specifications for all fasteners, assembly sequences, critical component installation procedures.
Depth:
Comprehensive, covering from basic maintenance to complete engine rebuilds, including diagnostic information.
File Type:
PDF (preferred for digital distribution)
Searchable:
Yes (essential for efficient use)
Printable:
Yes (allows for physical copy)
Resolution:
High resolution (300 dpi or higher) for clear diagrams and text.
Binding:
Not applicable for digital format; for printed, spiral binding is ideal for lay-flat use in a workshop.
Paper:
Not applicable for digital format; for printed, durable, glossy paper is preferred for workshop environments.
Type:
Four-stroke, single-cylinder, DOHC
Displacement 450:
449cc (approximately)
Displacement 505:
505cc (approximately)
Bore Stroke 450:
Specifics vary, but typical for this era might be around 95mm x 63.4mm
Bore Stroke 505:
Specifics vary, but typically a larger bore for the 505 variant.
Horsepower Estimate:
Estimated 50+ HP (for 450 variant, actual figures can vary based on tuning and dyno)
Torque Estimate:
Significant torque for class, specific figures vary.
Carburetor Model:
Likely Keihin FCR 41mm or similar for 2007 models.
Fuel Type:
Unleaded gasoline (high octane recommended for performance)
Type:
Constant mesh, 5-speed
Clutch:
Wet multi-plate clutch (hydraulic actuation common)
Optional Gearing:
Not typically offered as factory options, but aftermarket gearing is common.
Gear Ratios:
Specific gear ratios are detailed within the manual.
Transmission Oil Type:
Specific motorcycle transmission oil (e.g., Motorex Gear Oil 80W).
Wheelbase:
Around 1475 mm (58.1 inches) - specific to model generation.
Seat Height:
Around 965 mm (38 inches) - specific to model generation.
Dry Weight:
Around 105 kg (231 lbs) - specific to model generation.
Fuel Capacity:
Approximately 7.5 Liters (2.0 US Gallons).
Safety Certification:
Not applicable for off-road competition vehicles in the same way as street vehicles.
Brakes Front:
Hydraulic disc brake, dual-piston caliper (typically).
Brakes Rear:
Hydraulic disc brake, single-piston caliper (typically).
Frame:
Chromium-molybdenum steel central-tube frame.
Suspension Front:
WP USD (Upside-Down) forks, high-quality components for performance damping and adjustability.
Suspension Rear:
WP Monoshock with linkage system, adjustable for compression and rebound.
Oil Change:
Every 10-15 hours of riding (typical for competitive motocross, consult manual for precise recommendation).
Air Filter Cleaning:
After every few rides, or more frequently in dusty conditions.
Valve Clearance Check:
Typically every 20-30 hours of riding for performance engines.
Spark Plug Inspection:
Regularly, along with oil changes.
Engine Oil Type:
High-quality synthetic motorcycle engine oil, e.g., SAE 10W-50 (check manual for specific viscosity and API rating).
Engine Oil Capacity:
Approximately 1.1 - 1.2 Liters (check manual).
Coolant Type:
Water-glycol coolant mixture (50/50 ratio recommended for optimal temperature and corrosion protection).
Valve Train Wear:
Regular valve clearance checks are crucial to prevent premature wear or damage. Tappet wear can occur.
Cam Chain Tensioner:
Can sometimes be a point of wear; regular inspection is advised.
Carburetor Tuning:
Requires diligent maintenance and tuning for optimal performance across varying conditions.
Brand Origin:
Austrian manufacturer known for off-road motorcycles, racing heritage.
Sx F Lineage:
The SX-F line represents KTM's commitment to competitive motocross and supercross, evolving with technology and rider feedback.
2007 Updates:
The 2007 model represented a significant step for KTM's four-stroke motocross bikes, often featuring updated chassis, engine tuning, and suspension components.
Manufacturing Location:
Austria
Motocross Wins:
KTM models consistently achieve success in national and international motocross championships, reflecting their performance capabilities.
Performance Reviews:
Generally praised for strong engines, agile chassis, and quality suspension by motorcycle publications of the era.
Emissions Compliance:
Designed for off-road competition, not street legal compliance.
