Segment:
High-performance Enduro/Off-Road Motorcycle
Target Audience:
Enthusiast off-road riders, enduro competitors, and experienced dual-sport riders.
Key Competitors:
Husqvarna TE450, Beta RR450, Yamaha WR450F, Honda CRF450X, Suzuki RM-Z450 (off-road variants).
Performance Focus:
Designed for demanding off-road conditions, trail riding, and competitive enduro events.
Six Days Designation:
The 'Six Days' trim typically signifies a model equipped with special features and enhancements for the International Six Days Enduro (ISDE) event, often including upgraded components.
Systems Covered:
Engine, fuel system, ignition system, cooling system, transmission, clutch, chassis, suspension (front and rear), brakes (front and rear), electrical system, wiring diagrams, bodywork, wheels, tires, troubleshooting, maintenance.
Page Count:
Hundreds (exact count not specified, indicative of a comprehensive manual)
Manual Type:
Factory Service Repair Manual
Language:
English (Assumed, standard for international factory manuals)
Engine Mechanical:
Complete disassembly, inspection, repair, and reassembly of engine components (cylinder, piston, crankshaft, connecting rod, valves, camshafts, etc.).
Fuel System:
Carburetor (likely Keihin FCR) tuning, cleaning, and overhaul; fuel pump (if applicable for EFI variants); fuel tank and lines.
Ignition System:
Ignition coil, spark plug, CDI unit troubleshooting and replacement.
Cooling System:
Radiator, fan, coolant, water pump maintenance and repair.
Transmission And Clutch:
Gearbox inspection, repair, and lubrication; clutch plate replacement, adjustment, and hydraulic system service.
Chassis And Suspension:
Frame inspection and repair; front fork (e.g., WP USD) servicing, including oil changes, seal replacement, and adjustments; rear shock absorber (e.g., WP PDS or linkage-based) servicing and adjustment.
Brakes:
Hydraulic brake system servicing (bleeding, pad replacement, caliper overhaul, master cylinder service) for both front and rear.
Electrical System:
Complete wiring diagrams, component testing (lights, horn, starter, etc.), battery maintenance, and troubleshooting.
Bodywork And Ergonomics:
Fairing, seat, fuel tank, handguards, and other body panel removal, installation, and repair.
Maintenance Procedures:
Routine checks, lubrication points, filter replacements, fluid changes, chain adjustment, and general upkeep.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon problems, fault finding charts.
Overhaul Procedures:
Detailed step-by-step instructions for complete engine, transmission, and suspension unit overhauls.
Diagnostic Procedures:
Methods for identifying component failures and performance issues.
Depth Of Information:
Comprehensive. Covers basic maintenance to complete engine rebuilds and advanced diagnostics, suitable for both home mechanics and professional technicians.
Engine Type:
Four-stroke, Single-cylinder, Liquid-cooled, SOHC
Displacement:
449.3 cc (approx.)
Bore X Stroke:
Likely 95 mm x 63.4 mm (common for this generation LC4 450)
Compression Ratio:
Typically around 11.5:1 to 12.0:1
Horsepower Estimated:
Approximately 50-55 HP (at crankshaft, may vary slightly by year/tune)
Torque Estimated:
Approximately 45-48 Nm (at crankshaft, may vary slightly by year/tune)
Fuel Delivery:
Carburetor (Keihin FCR 39 or similar)
Fuel Type:
Unleaded gasoline, minimum 91 octane
Oil Type:
JASO MA certified motorcycle-specific 4-stroke engine oil, viscosity typically 10W/40 or 15W/50.
Oil Capacity:
Approximately 1.1 - 1.3 Liters (check manual for exact specification, often shared with transmission oil).
Transmission Type:
6-speed constant mesh
Clutch Type:
Wet multi-plate clutch, hydraulically operated
Gear Ratios:
Specific ratios would be detailed in the manual, designed for off-road performance.
Final Drive:
O-ring sealed chain, typically 520 pitch.
Length:
Varies, typically around 2100-2200 mm
Width:
Varies, typically around 800-850 mm (excluding mirrors)
Height:
Varies, typically around 1200-1300 mm (seat height significantly lower)
Seat Height:
Approximately 940-960 mm (unladen)
Dry Weight:
Approximately 110-115 kg (dry)
Wet Weight:
Approximately 120-125 kg (ready to ride, with fluids)
Fuel Capacity:
Approximately 8.5 - 9.5 Liters
Wheelbase:
Approximately 1470-1480 mm
Crash Safety Ratings:
N/A (Motorcycles typically do not receive automotive crash test ratings)
Braking System:
Hydraulic disc brakes front and rear (typically Brembo components), designed for strong stopping power in off-road conditions.
Suspension Features:
High-quality, adjustable suspension (e.g., WP USD forks, WP PDS or linkage rear shock) for optimal control and impact absorption.
Lighting System:
Headlight, taillight, brake light, turn signals (may be optional or removed for racing configurations).
Handguards:
Standard on Six Days models for protection against roost, branches, and impacts.
Display System:
Basic LCD display showing speed, odometer, trip meters, and possibly engine hour meter. No advanced infotainment features.
Electronic Aids:
Minimal. Primarily focused on mechanical performance. No traction control or advanced electronic rider aids typically found on modern street bikes.
Connectivity Options:
None. Purely mechanical and electrical systems. No Bluetooth, GPS, or smartphone integration.
Oil And Filter Change:
Recommended every 15-20 operating hours or annually. Specific intervals vary based on riding conditions.
Air Filter Cleaning:
Recommended every 5-10 operating hours, or more frequently in dusty conditions.
Spark Plug Inspection:
Recommended every 15-20 operating hours.
Valve Clearance Check:
Recommended every 20-30 operating hours or annually. Critical for performance and engine longevity.
Chain Adjustment And Lubrication:
Check and adjust tension every 5-10 operating hours. Lubricate after washing or riding in wet conditions.
Suspension Service:
Fork oil change every 50-100 operating hours; full suspension service annually or as needed based on riding intensity.
Coolant Type:
Ethylene glycol based antifreeze, mixed with distilled water at a 50/50 ratio.
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Fork Oil Type And Level:
Specific viscosity (e.g., SAE 5W or 7.5W) and level detailed in the manual, crucial for proper suspension function.
Common Wear Items:
Clutch plates, wheel bearings, steering head bearings, chain and sprockets, fork seals, exhaust packing (if applicable).
Potential Reliability Points:
Valve seat wear (can be addressed with harder valve seat materials), carburetors can require periodic cleaning/adjustment, some early models had potential issues with stator or voltage regulators.
Manufacturer Origin:
Austria
Racing Legacy:
KTM has a strong heritage in off-road racing, including enduro, motocross, and rally raid, which heavily influences its production models.
Exc Lineage:
The EXC line has been KTM's flagship enduro model for decades, continuously evolving with engine technology, chassis design, and suspension.
Engine Development:
The 450 EXC generally utilizes KTM's LC4 engine architecture, which has seen numerous updates and refinements over the years, including improvements in power delivery, reliability, and weight.
Manufacturing Location:
Austria (Primary)
Six Days Context:
The 'Six Days' designation celebrates KTM's success and participation in the International Six Days Enduro, often featuring model-specific graphics and select component upgrades.
