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Derbi GPR 125 Racing User Manual

Derbi GPR 125 Racing
145 pages
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Table of Contents

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Derbi GPR 125 Racing Specifications

General IconGeneral
Engine TypeSingle-cylinder, 4-stroke
Displacement124.8 cc
Torque10.5 Nm
Transmission6-speed
Fuel SystemCarburetor
Front SuspensionUpside-down fork
Rear SuspensionMonoshock
Seat Height810 mm
CoolingLiquid-cooled
Power15 hp (11 kW)
Max Power RPM9750 RPM
Max Torque RPM8, 000 rpm
Front BrakeDisc brake
Rear BrakeDisc brake
Fuel Capacity13 litres

Summary

GENERAL INFORMATION AND REGULATIONS

SAFETY REGULATIONS

Safety precautions for working on the engine and handling fuel.

TIGHTENING TORQUES

ENGINE TIGHTENING TORQUES

Torque specifications for engine components.

CHASSIS TIGHTENING TORQUES

Torque specifications for chassis securing devices.

PERIODICAL INSPECTIONS AND ADJUSTMENTS

PERIODICAL MAINTENANCE/LUBRICATION INTERVALS

Intervals for periodic maintenance and lubrication tasks.

ENGINE

CO MEASUREMENT AND ADJUSTMENT

Adjusting engine idle speed and CO concentration.

CHASSIS

ELECTRICAL SYSTEM

ENGINE DISMANTLING AND REASSEMBLY

ENGINE REMOVAL AND COMPONENT DISMANTLING

Procedures for removing the engine and dismantling key components.

CRANKSHAFT, CYLINDER, AND PISTON

Dismantling and inspecting cylinder head, piston, and crankshaft.

TRANSMISSION AND GEAR SELECTOR

Dismantling transmission, gear selector, and balancer.

CLUTCH ASSEMBLY

Procedures for dismantling and inspecting the clutch.

MAGNETO AND STARTER SYSTEMS

Dismantling and inspecting magneto and starter components.

CARBURETTOR PROCEDURES

Dismantling, inspecting, and refitting the carburetor.

ENGINE REASSEMBLY

Steps for reassembling crankshaft, transmission, and engine parts.

CHASSIS – FRONT WHEEL AND BRAKES

REAR WHEEL AND BRAKES

REAR BRAKE SYSTEM MAINTENANCE

Dismantling, inspecting, and fitting rear brake components.

TRANSMISSION

FORKS

HANDLEBARS

SHOCK ABSORBER AND SWINGING ARM

TROUBLESHOOTING

IGNITION SYSTEM FAULTS

Diagnosing and troubleshooting ignition system issues like no spark.

STARTER MOTOR AND RELATED COMPONENTS

Troubleshooting starter motor, fuse, battery, and relay issues.

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