🏷️ Basic Information

Make:

KTM

Model:

450 SX-F

Year:

2011

Product Type:

Engine Parts Manual

👋 Introduction

Segment:

Professional Motocross Competition

Competitors:

Yamaha YZ450F, Honda CRF450R, Kawasaki KX450F, Suzuki RM-Z450

Vehicle Attributes:

Lightweight chassis, powerful single-cylinder engine, advanced suspension, race-ready ergonomics

📋 Manual Details

Primary Focus:

Engine Component Identification and Assembly

Estimated Pages:

Variable (PDF content dependent)

Type:

Illustrated Parts List / Exploded View Catalog

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Components:

Cylinder Head, Cylinder, Piston, Crankshaft, Connecting Rod, Crankcases, Valves, Camshafts, Timing System, Oil Pump, Water Pump, Clutch Assembly, Gearbox Internals, Ignition System Components (referencing specific part identification)

Assembly Guidance:

Disassembly and Assembly (visually aided by exploded views)

Depth:

Component Identification, Part Number Referencing, Exploded Views for Reassembly

📊 Manual Specifications

File Type:

PDF

Printability:

High-resolution images suitable for printing

Binding:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Four-stroke, SOHC, Single-cylinder

Displacement:

449.3 cc

Bore X Stroke:

97 mm x 60.8 mm

Compression Ratio:

12.3:1

Peak Horsepower:

Approx. 50-55 hp (at crankshaft, manufacturer estimate)

Peak Torque:

Approx. 35-40 lb-ft (at crankshaft, manufacturer estimate)

Fuel Delivery:

Keihin FCR 41 MX (Flat Slide Carburetor)

Ignition:

Digital CDI

Cooling Method:

Liquid-cooled

🔧 Transmission

Transmission Type:

5-speed, constant mesh

Clutch Type:

Wet multi-disc clutch (hydraulically actuated)

Final Drive:

Chain

📐 Dimensions

Length:

Approx. 2145 mm (84.4 in)

Width:

Approx. 810 mm (31.9 in)

Height:

Approx. 1260 mm (49.6 in)

Dry Weight:

Approx. 103.5 kg (228.2 lbs)

Fuel Tank Capacity:

7.0 liters (1.85 US gal)

Front Wheel Size:

21"

Rear Wheel Size:

19"

Front Tire Size:

80/100-21

Rear Tire Size:

110/90-19

🛡️ Safety Features

Safety Certification:

N/A (Off-road Competition Vehicle)

Brakes Front:

Hydraulic disc brake with 2-piston caliper (Brembo)

Brakes Rear:

Hydraulic disc brake with 1-piston caliper (Brembo)

Handlebars:

Renthal tapered aluminum handlebar

💡 Technology Features

Infotainment System:

N/A (Pure Competition Motorcycle)

Traction Control:

N/A

Launch Control:

N/A (Typically aftermarket or not standard for this model year)

Bluetooth:

N/A

🔧 Maintenance

Oil Change Interval:

Refer to owner's manual or service manual; typically every 10-15 operating hours for competition use.

Air Filter Cleaning:

After every ride or as conditions dictate.

Valve Clearance Check:

Refer to owner's manual or service manual; typically every 20-30 operating hours for competition use.

Engine Oil Type:

SAE 10W-50 (Synthetic Motorcycle Oil, JASO MA/MA2)

Engine Oil Capacity:

Approx. 1.1 liters (with filter change)

Coolant Type:

Ethylene glycol-based antifreeze with corrosion inhibitors (50% mix with distilled water)

Brake Fluid Type:

DOT 4

Clutch Fluid Type:

Mineral oil (KTM specific hydraulic clutch fluid or equivalent)

Common Wear Items:

Piston rings, valve guides, clutch plates, chain and sprockets, wheel bearings, fork seals (dependent on usage)

Typical Fixes:

Regular engine rebuilds (piston, rings, valves), clutch maintenance, suspension servicing.

📚 Vehicle History

Manufacturer Origin:

Austria

Sx-F Lineage:

Part of KTM's long-standing tradition of producing high-performance off-road motorcycles, evolving from earlier 4-stroke motocross platforms.

Manufacturing Location:

Austria

🏆 Awards & Recognition

Motocross Wins:

KTM 450 SX-F models have consistently achieved numerous victories in professional motocross and supercross championships worldwide.