Motorcycle Overview

The 2011 KTM 690 SMC was the culmination of decades of single-cylinder engineering refinement, a machine that took KTM's proven 654cc LC4 platform and dressed it in 17-inch supermoto-specific bodywork, fully adjustable WP suspension, and radial-mount Brembo brakes. By 2011, the LC4 SOHC four-valve engine was managed by a refined Keihin EFI system with dual-spark ignition (two spark plugs per cylinder), producing over 62 horsepower from 654cc -- a specific output that rivals many larger-displacement configurations. The engine's broad torque delivery, combined with the motorcycle's dry weight of approximately 145kg, delivers a power-to-weight figure that puts sportbikes to shame while retaining the single-cylinder character, light weight, and low center of gravity that make it uniquely controllable in tight urban riding.

The 2011 SMC sat on a chrome-molybdenum steel trellis frame with an aluminum subframe, 250mm of suspension travel at both ends, and a wheelbase engineered for agile urban maneuvering. Front brakes consisted of a 300mm disc with a Brembo four-piston radial caliper. Tyres were a 120/70-ZR17 front and 160/60-ZR17 rear mounted on cast alloy wheels. Instrumentation included a digital speedometer, dual tripmeters, fuel gauge, clock, and a low-fuel warning system.

Single-cylinder powertrain maintenance follows a predictable rhythm: valve clearances demand the most attention due to the LC4's thermal expansion characteristics. Oil service at 5,000-7,500km intervals is critical given that engine and transmission share the same lubricant. Air filter replacement should occur more frequently if the motorcycle sees mixed street/off-road duty. This service manual covers every system with factory-grade depth, from simple oil changes to a complete engine rebuild.

Service & Repair Scope

• Valve Service - Valve clearance inspection using a feeler gauge with SOHC four-valve shim-under-bucket design; camshaft removal for shim replacement; intake/exhaust clearance specifications (cold); camshaft lobe wear measurement; cam bearing journal clearance; timing verification marks; cam chain tensioner function test
• Engine Maintenance - Oil change with full synthetic 10W-50 (engine and transmission shared oil, approximately 1.5L dry fill); oil filter and screen service; spark plug inspection and gap (dual-plug engine); valve cover gasket replacement; oil pressure test with external gauge
• Engine Mechanical - Cylinder head removal with proper bolt sequence; head gasket inspection for combustion gas leaks; cylinder removal; piston removal and ring replacement; Nikasil cylinder wall inspection (scoring marks and plating condition -- critical and expensive to correct); piston ring end-gap measurement; wrist pin and small-end play; big-end bearing clearance and axial play; crankshaft radial run-out measurement; crankcase split; oil pump inspection with gear clearance measurement
• Fuel Injection & EMS - Keihin EMS diagnostic connector fault code retrieval; throttle body inspection and throttle plate cleaning; TPS (throttle position sensor) voltage output calibration; fuel injector bench testing (flow and resistance); fuel pump operation and pressure test; fuel filter and fuel pressure regulator inspection; air filter replacement and airbox drain inspection
• Cooling System - Coolant drain and flush with correct specification; water pump shaft and seal replacement; thermostat removal, bench test, and replacement (opening temperature); radiator cap pressure test; cooling fan switch operation; overflow bottle function
• Clutch - Clutch cable adjustment (free play specification); clutch plate wear measurement (friction and steel plate thickness limits); clutch basket notch depth measurement; bearing inspection; spring free-length comparison to minimum; slave cylinder seal replacement; hydraulic fluid bleed
• Transmission - Gearbox removal; gear engagement dog wear; shift fork width and rail clearance measurement; shift drum inspection; shift cam position verification; bearing replacement; gearbox output shaft seal replacement
• Chassis & Frame - Steering head bearing play adjustment; swingarm pivot bearing lubrication and play check; engine mounting bolt torque and threadlocker specification; rear subframe bolted joint inspection (aluminum-to-steel); footpeg bolt torque
• Front Suspension - Fork oil level check and oil replacement; fork oil specification (viscosity and volume); fork seal replacement; lower leg bushing wear inspection; cartridge function; fork spring free-length measurement
• Rear Suspension - Shock spring free-length measurement; rebound/compression damping click count specification; shock seal inspection; linkage bearing, seal, and spacer replacement -- this is the most critical regular chassis service item on WP-linked motorcycles; bellcrank bearing assessment; dog-bone condition
• Brakes - Front brake pad thickness measurement; rear brake pad replacement; front and rear disc wear measurement against minimum thickness specification; brake fluid flush with DOT 4 or 5.1; brake hose inspection and replacement interval; front caliper piston seal replacement; rear caliper rebuild; master cylinder seal kit
• Wheels & Tyres - Tyre removal and replacement on cast alloy wheel; wheel bearing replacement (specification for front and rear); rim damage assessment; wheel balance; chain and sprocket wear (chain stretch, front and rear sprocket hook profile); final drive sprocket nut torque; chain adjustment
• Electrical - Stator resistance between phases; regulator/rectifier output across RPM range; battery specification and load test; ECU identification and replacement; dual-spark coil resistance testing; complete wiring diagram with connector pinout and wire color codes; fuse identification; headlight bulb removal (H7 halogen); turn signal and tail light test; starter relay and motor brush inspection
• Bodywork - Fuel tank removal (fuel line and electrical disconnect procedure); seat removal; fairing and radiator shroud removal; number plate and fender mounting; exhaust heat shield removal

Technical Specifications

• Engine: 654cc SOHC four-valve liquid-cooled single, dual-spark, Keihin EFI
• Output: approximately 62 HP; torque approximately 60 Nm
• Bore x stroke: 102.0mm x 80.0mm
• Valve clearance: intake and exhaust (cold) specifications; shim sizes and selection chart
• Oil capacity: approximately 1.5L (dry fill); 10W-50 full synthetic specification
• Spark plugs: dual-plug setup, type and gap (NGK or equivalent, approximately 0.7mm)
• Clutch: plate minimum thickness (friction and steel); basket inside diameter limit; notch depth limit; spring free-length minimum
• Transmission: 6-speed; gear ratios; final drive sprocket sizes (15T front, 45T rear standard)
• Front suspension: WP 48mm inverted fork, oil capacity and viscosity specification
• Rear suspension: WP monoshock, 250mm travel, spring rate and adjustability specification
• Brakes: front 300mm disc (min thickness); rear 240mm disc (min thickness); DOT 4/5.1 fluid
• Tyres: 120/70-ZR17 front, 160/60-ZR17 rear; pressures 32 psi F, 34 psi R
• Chain: 520 pitch; slack specification (25-35mm at midpoint)

Diagnostic Information

Diagnostic coverage includes Keihin EMS fault codes (accessed via the diagnostic connector), with definitions for TPS, MAP, coolant temperature, air temperature, injector circuit, and other sensor faults. Compression testing provides a baseline minimum reading to assess ring and valve sealing. Charging system diagnostics specify stator AC output phase-to-phase (AC voltage at specified RPM) and regulator DC output (13.5-15.0V at 5,000 RPM). Valve clearance inspection procedures with measurement and shim identification. Cooling system diagnostics including thermostat bench test and water pump shaft play inspection. Electrical no-start diagnostic flow chart covering kill switch, ignition lock, starter relay, ECU power, and crank sensor.

Illustrations & Diagrams Included

Engine exploded assembly with torque values and fastener identification; cylinder head sectional view with SOHC dual-spark layout; throttle body and Keihin EMS components; frame and chassis exploded view with bolt torque specifications; WP fork cross-section with oil level detail; monoshock exploded view; brake caliper and master cylinder diagrams; complete wiring schematic with color codes and terminal numbers; fuel system flow diagram; exhaust system and mounting detail; body panel attachment and fastener identification.

Compatibility

This service manual covers the 2011 KTM 690 SMC. Procedures and specifications also apply to 2008-2012 KTM 690 SMC models and the 690 Enduro/Supermoto variants of the same generation. The LC4 engine architecture is shared with the 640 Duke (1994-2006), the 690 Duke (2008+), and the 690 Enduro, though model-specific differences in fuel mapping, gearing, and suspension calibration exist.

File Properties

• Format: Searchable PDF with bookmarked chapter navigation and full-text search
• Language: English
• Delivery: Instant digital download after purchase
• Access: 24/7 availability from any internet-connected device
• Printing: High-resolution output for individual procedures or chapter sections

Motorcycle Overview

The 2011 KTM 690 SMC was the culmination of decades of single-cylinder engineering refinement, a machine that took KTM's proven 654cc LC4 platform and dressed it in 17-inch supermoto-specific bodywork, fully adjustable WP suspension, and radial-mount Brembo brakes. By 2011, the LC4 SOHC four-valve engine was managed by a refined Keihin EFI system with dual-spark ignition (two spark plugs per cylinder), producing over 62 horsepower from 654cc -- a specific output that rivals many larger-displacement configurations. The engine's broad torque delivery, combined with the motorcycle's dry weight of approximately 145kg, delivers a power-to-weight figure that puts sportbikes to shame while retaining the single-cylinder character, light weight, and low center of gravity that make it uniquely controllable in tight urban riding.

The 2011 SMC sat on a chrome-molybdenum steel trellis frame with an aluminum subframe, 250mm of suspension travel at both ends, and a wheelbase engineered for agile urban maneuvering. Front brakes consisted of a 300mm disc with a Brembo four-piston radial caliper. Tyres were a 120/70-ZR17 front and 160/60-ZR17 rear mounted on cast alloy wheels. Instrumentation included a digital speedometer, dual tripmeters, fuel gauge, clock, and a low-fuel warning system.

Single-cylinder powertrain maintenance follows a predictable rhythm: valve clearances demand the most attention due to the LC4's thermal expansion characteristics. Oil service at 5,000-7,500km intervals is critical given that engine and transmission share the same lubricant. Air filter replacement should occur more frequently if the motorcycle sees mixed street/off-road duty. This service manual covers every system with factory-grade depth, from simple oil changes to a complete engine rebuild.

Service & Repair Scope

• Valve Service - Valve clearance inspection using a feeler gauge with SOHC four-valve shim-under-bucket design; camshaft removal for shim replacement; intake/exhaust clearance specifications (cold); camshaft lobe wear measurement; cam bearing journal clearance; timing verification marks; cam chain tensioner function test
• Engine Maintenance - Oil change with full synthetic 10W-50 (engine and transmission shared oil, approximately 1.5L dry fill); oil filter and screen service; spark plug inspection and gap (dual-plug engine); valve cover gasket replacement; oil pressure test with external gauge
• Engine Mechanical - Cylinder head removal with proper bolt sequence; head gasket inspection for combustion gas leaks; cylinder removal; piston removal and ring replacement; Nikasil cylinder wall inspection (scoring marks and plating condition -- critical and expensive to correct); piston ring end-gap measurement; wrist pin and small-end play; big-end bearing clearance and axial play; crankshaft radial run-out measurement; crankcase split; oil pump inspection with gear clearance measurement
• Fuel Injection & EMS - Keihin EMS diagnostic connector fault code retrieval; throttle body inspection and throttle plate cleaning; TPS (throttle position sensor) voltage output calibration; fuel injector bench testing (flow and resistance); fuel pump operation and pressure test; fuel filter and fuel pressure regulator inspection; air filter replacement and airbox drain inspection
• Cooling System - Coolant drain and flush with correct specification; water pump shaft and seal replacement; thermostat removal, bench test, and replacement (opening temperature); radiator cap pressure test; cooling fan switch operation; overflow bottle function
• Clutch - Clutch cable adjustment (free play specification); clutch plate wear measurement (friction and steel plate thickness limits); clutch basket notch depth measurement; bearing inspection; spring free-length comparison to minimum; slave cylinder seal replacement; hydraulic fluid bleed
• Transmission - Gearbox removal; gear engagement dog wear; shift fork width and rail clearance measurement; shift drum inspection; shift cam position verification; bearing replacement; gearbox output shaft seal replacement
• Chassis & Frame - Steering head bearing play adjustment; swingarm pivot bearing lubrication and play check; engine mounting bolt torque and threadlocker specification; rear subframe bolted joint inspection (aluminum-to-steel); footpeg bolt torque
• Front Suspension - Fork oil level check and oil replacement; fork oil specification (viscosity and volume); fork seal replacement; lower leg bushing wear inspection; cartridge function; fork spring free-length measurement
• Rear Suspension - Shock spring free-length measurement; rebound/compression damping click count specification; shock seal inspection; linkage bearing, seal, and spacer replacement -- this is the most critical regular chassis service item on WP-linked motorcycles; bellcrank bearing assessment; dog-bone condition
• Brakes - Front brake pad thickness measurement; rear brake pad replacement; front and rear disc wear measurement against minimum thickness specification; brake fluid flush with DOT 4 or 5.1; brake hose inspection and replacement interval; front caliper piston seal replacement; rear caliper rebuild; master cylinder seal kit
• Wheels & Tyres - Tyre removal and replacement on cast alloy wheel; wheel bearing replacement (specification for front and rear); rim damage assessment; wheel balance; chain and sprocket wear (chain stretch, front and rear sprocket hook profile); final drive sprocket nut torque; chain adjustment
• Electrical - Stator resistance between phases; regulator/rectifier output across RPM range; battery specification and load test; ECU identification and replacement; dual-spark coil resistance testing; complete wiring diagram with connector pinout and wire color codes; fuse identification; headlight bulb removal (H7 halogen); turn signal and tail light test; starter relay and motor brush inspection
• Bodywork - Fuel tank removal (fuel line and electrical disconnect procedure); seat removal; fairing and radiator shroud removal; number plate and fender mounting; exhaust heat shield removal

Technical Specifications

• Engine: 654cc SOHC four-valve liquid-cooled single, dual-spark, Keihin EFI
• Output: approximately 62 HP; torque approximately 60 Nm
• Bore x stroke: 102.0mm x 80.0mm
• Valve clearance: intake and exhaust (cold) specifications; shim sizes and selection chart
• Oil capacity: approximately 1.5L (dry fill); 10W-50 full synthetic specification
• Spark plugs: dual-plug setup, type and gap (NGK or equivalent, approximately 0.7mm)
• Clutch: plate minimum thickness (friction and steel); basket inside diameter limit; notch depth limit; spring free-length minimum
• Transmission: 6-speed; gear ratios; final drive sprocket sizes (15T front, 45T rear standard)
• Front suspension: WP 48mm inverted fork, oil capacity and viscosity specification
• Rear suspension: WP monoshock, 250mm travel, spring rate and adjustability specification
• Brakes: front 300mm disc (min thickness); rear 240mm disc (min thickness); DOT 4/5.1 fluid
• Tyres: 120/70-ZR17 front, 160/60-ZR17 rear; pressures 32 psi F, 34 psi R
• Chain: 520 pitch; slack specification (25-35mm at midpoint)

Diagnostic Information

Diagnostic coverage includes Keihin EMS fault codes (accessed via the diagnostic connector), with definitions for TPS, MAP, coolant temperature, air temperature, injector circuit, and other sensor faults. Compression testing provides a baseline minimum reading to assess ring and valve sealing. Charging system diagnostics specify stator AC output phase-to-phase (AC voltage at specified RPM) and regulator DC output (13.5-15.0V at 5,000 RPM). Valve clearance inspection procedures with measurement and shim identification. Cooling system diagnostics including thermostat bench test and water pump shaft play inspection. Electrical no-start diagnostic flow chart covering kill switch, ignition lock, starter relay, ECU power, and crank sensor.

Illustrations & Diagrams Included

Engine exploded assembly with torque values and fastener identification; cylinder head sectional view with SOHC dual-spark layout; throttle body and Keihin EMS components; frame and chassis exploded view with bolt torque specifications; WP fork cross-section with oil level detail; monoshock exploded view; brake caliper and master cylinder diagrams; complete wiring schematic with color codes and terminal numbers; fuel system flow diagram; exhaust system and mounting detail; body panel attachment and fastener identification.

Compatibility

This service manual covers the 2011 KTM 690 SMC. Procedures and specifications also apply to 2008-2012 KTM 690 SMC models and the 690 Enduro/Supermoto variants of the same generation. The LC4 engine architecture is shared with the 640 Duke (1994-2006), the 690 Duke (2008+), and the 690 Enduro, though model-specific differences in fuel mapping, gearing, and suspension calibration exist.

File Properties

• Format: Searchable PDF with bookmarked chapter navigation and full-text search
• Language: English
• Delivery: Instant digital download after purchase
• Access: 24/7 availability from any internet-connected device
• Printing: High-resolution output for individual procedures or chapter sections