2009 Derbi GPR 125 4-stroke & GPR 125 4-stroke R Workshop Manual • P/N C4085-91017

Technical and Service Documentation for 2009 Derbi GPR 125 4-Stroke

• Covers the 2009 Derbi GPR 125 4-stroke and GPR 125 4-stroke R variants, detailing engine, chassis, fuel, and electrical systems for this 125cc liquid-cooled platform
• Official Derbi publication C4085-91017 © 2009 Nacional Motor, S.A.U.
• Contains 26 detailed tightening torque tables, 247 pages of assembly data, and comprehensive engine component identification diagrams
• Delivered as an instant download, making it immediately accessible on your device for fast reference on the bench
• Indexed PDF search covers every chapter, appendix, and repair specification
• Features 2009 model-specific carburetor and emissions setup notes that differ from earlier 2-stroke generations

Component and System Overview

This 2009 Derbi GPR 125 4-stroke workshop manual contains exhaustive explanations for the maintenance, installation, and teardown of major vehicle systems. The documentation covers the 124.2 cc DOHC engine architecture. This includes valve adjustment data using calibrated shims, crankshaft assembly layouts, and lubrication circuit verification. It provides professional-level breakdowns for the Keihin CVK Ø30 carburetor, transmission gear ratios, and the 6-speed manual gearbox configuration.

Technical Reference and Specification Highlights

Engine compression values are listed at a standard of over 15 kg/cm², with a service limit of 13 kg/cm². The intake valve clearance is specified at 0.10–0.15 mm, while exhaust valves require 0.15–0.20 mm. Routine fluid service requires 1.15 liters for an oil and filter change, utilizing the recommended SAE 10W-40 viscosity. Coolant capacity for the expansion chamber is documented at 230 ml. The charging system utilizes a three-phase magneto producing 13v–15v at 8,000 rpm. Detailed torque specifications are included for major components, such as the 12 Nm requirement for the spark plug and 35–40 Nm for the brake caliper bolts. Operating around heavy motorcycle lifts and handling pressurized fluids requires appropriate personal protective equipment and a secure workspace to prevent injury. Having these exact factory measurements at hand takes the guesswork out of any mechanical repair, ensuring components are torqued and aligned to strict OEM standards.

Document Reference: © 2009 DERBI - Nacional Motor, S.A.U.