Target Audience:
Enduro racers, hard enduro enthusiasts, and off-road riders needing a lightweight 2-stroke
Segment:
Competition enduro motorcycle
Key Advantage:
Lightweight chassis with strong 2-stroke torque, easier to ride in tight technical terrain than 4-stroke rivals
Rivals:
Honda CR series, Yamaha YZ two-strokes, Husqvarna enduro models
Engine:
Liquid-cooled 2-stroke single with case-reed induction
Suspension:
WP USD front fork and WP rear shock, long-travel off-road setup
Chassis:
Chromoly steel perimeter frame designed for enduro use
Coverage Areas:
Engine, fuel system, cooling, chassis, suspension, brakes, wheels, electrical, bodywork
Manual Type:
Workshop service and repair manual
Page Count:
Test Manual - 100 pages (final manual page count may vary by edition)
Delivery Method:
Instant digital download
Binding:
Digital (PDF document)
Intended Users:
Professional technicians and experienced DIY owners
Engine:
Cylinder, piston, crankshaft, and bottom-end service procedures
Fuel System:
Carburetor removal, disassembly, jetting, and tuning
Cooling System:
Radiator, hoses, water pump, and coolant service
Ignition:
CDI unit, stator, ignition coil, and spark plug specifications
Clutch:
Clutch removal, inspection, and adjustment
Transmission:
Gearbox disassembly, shift mechanism, and gear inspection
Front Suspension:
WP fork disassembly, seal replacement, and oil capacity
Rear Suspension:
WP shock removal and linkage service
Brakes:
Front and rear brake pad, disc, and master cylinder service
Wheels and Tires:
Wheel removal, spoke service, and tire fitting
Electrical System:
Wiring diagrams, lighting, and electrical troubleshooting
Frame and Bodywork:
Frame inspection and plastic panel removal
Torque Specifications:
Fastener torque values throughout the manual
Fluid Capacities:
Oil, coolant, and fork oil capacities
Tightening Sequences:
Cylinder head and critical fastener sequences
Troubleshooting:
Symptom-based diagnostic charts for engine, electrical, and chassis faults
Special Tools:
Factory special tool references where required
Periodic Maintenance:
Lubrication points, chain adjustment, and service schedules
Detail Level:
Full teardown and rebuild instructions with exploded diagrams
Illustrations:
Line drawings, exploded views, and wiring diagrams
Parts Information:
Part numbers and exploded part diagrams for component identification
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Engine Type:
Single-cylinder 2-stroke, liquid-cooled, case-reed induction
Displacement:
Approximately 144 cc (bored/stroked from the 125 cc platform)
Cooling:
Liquid cooling with single radiator
Lubrication:
Premix (oil mixed with fuel)
Power Output:
Approximately 30+ hp depending on year and jetting
Carburetor:
Keihin PWM/PHBG type carburetor, jetted per model year
Fuel:
Unleaded premium gasoline with 2-stroke oil premix
Fuel Tank Capacity:
Approximately 9-10 liters depending on year
Standard Transmission:
6-speed constant-mesh gearbox
Clutch:
Wet multi-plate clutch, hydraulic or cable actuated depending on year
Gearbox Service:
Full transmission disassembly, inspection, and rebuild procedures covered
Shift Mechanism:
Shift drum and shift fork service covered in manual
Wheelbase:
Approximately 1,425-1,458 mm depending on year
Seat Height:
Approximately 925-940 mm
Ground Clearance:
Approximately 340-385 mm depending on year
Curb Weight:
Approximately 95-100 kg (fuel tank full), depending on year
Dry Weight:
Approximately 90-95 kg depending on year
Crash Test Information:
N/A - competition off-road motorcycles are not crash tested by consumer agencies
Brakes:
Hydraulic disc brakes front and rear
Tires:
Knobby off-road tires for enduro terrain
Frame:
Chromoly steel frame with engineered crash resilience
Handguards:
Enduro handguard provision for lever and hand protection
Piston Inspection:
Inspect piston and rings regularly; 2-stroke top-end service typically every 30-50 hours of hard use
Gear Oil:
Change transmission oil approximately every 15-20 hours or per schedule
Air Filter:
Clean and oil after every ride in dusty conditions
Chain:
Clean, lube, and adjust regularly
Transmission Oil:
Motorex or equivalent 2-stroke gearbox oil, capacity approximately 0.5-0.7 liters depending on year
Coolant:
Silicate-free motorcycle coolant, roughly 1 liter system capacity
Fork Oil:
WP-specified fork oil, capacity per fork leg listed in manual
2-Stroke Oil:
Premix at manufacturer-specified ratio (typically 1:40 to 1:60)
Top-End Wear:
Piston, ring, and cylinder wear is the primary wear item on 2-strokes
Fork Seals:
WP fork seals are a common wear item and replacement is covered
Reed Valve:
Reed petals should be inspected for cracking during top-end service
Water Pump Seal:
Inspect for coolant leakage into transmission oil
Manufacturer:
KTM (Kraftfahrzeuge Trunkenpolz Mattighofen), Austria, founded 1934
Reputation:
Long-standing leader in European off-road and enduro competition motorcycles
Origins:
Developed from the KTM 125 EXC platform with a larger 144 cc bore for more torque
Era Changes:
Chassis, suspension, and engine refinements across 1999-2010 model years
Class Context:
Served the enduro class between the 125 cc and 250 cc 2-stroke categories
Production Location:
Mattighofen, Austria
