🏷️ Basic Information

Make:

Derbi

Model:

GPR 125 NUDE

Model Variant:

NUDE SPORT

Product Name:

Derbi GPR 125 NUDE 2004 & NUDE SPORT 2006 Parts Catalogue

Product Description:

Derbi GPR125 NUDE 2004 & NUDE SPORT 2006 Parts Catalogue / Parts Finder Manual

👋 Introduction

Market Position:

The Derbi GPR 125 NUDE and NUDE SPORT were positioned as sporty, entry-level performance motorcycles in the 125cc segment, targeting younger riders and those seeking a stylish and agile machine.

Competitive Analysis:

Competed against other 125cc sportbikes from manufacturers like Aprilia (RS 125), Yamaha (YZF-R125), Honda (CBR125R), and KTM (125 Duke) in its era.

Key Features:

Sporty design, capable 125cc engine, agile handling, dual-disc front braking system (common for its class), attractive styling.

📋 Manual Details

Applicable Model Years:

2004, 2006

Covered Models:

Derbi GPR 125 NUDE (2004), Derbi GPR 125 NUDE SPORT (2006)

Specific Variants Covered:

NUDE (2004) and NUDE SPORT (2006) models, indicating potential minor differences in fairings or accessories between these specific years/trims.

Page Count:

98

Manual Type:

Parts Catalogue / Parts Finder Manual

Language:

English, Italian, Spanish

File Format:

PDF

📖 Manual Coverage

Systems Covered:

Engine, Chassis, Suspension, Brakes, Electrical System, Fuel System, Cooling System, Exhaust System, Bodywork, Wheels and Tires, Controls, Accessories

Procedures Included:

Parts identification, Part number lookup, Component assembly visualization

Technical Depth:

Detailed component breakdown with associated part numbers and exploded diagrams for precise identification and ordering.

Diagram Quality:

Exploded diagrams provide clear visual representation of how components assemble, essential for accurate part identification and ordering for repairs or replacements.

Parts Images Included:

Yes, all parts are accompanied by images.

Parts Numbers Included:

Yes, all parts have associated part numbers.

📊 Manual Specifications

File Format:

PDF

Print Quality:

GOOD QUALITY & FULLY PRINTABLE

Binding Type:

Digital (PDF)

Paper Type:

Not Applicable (Digital Format)

⚙️ Engine Specifications

Engine Type:

Liquid-cooled, 2-stroke, single-cylinder

Displacement:

124.8 cc (approximately)

Bore X Stroke:

54 mm x 54.5 mm (typical for GPR 125)

Compression Ratio:

Approximately 11.5:1 to 12.5:1 (varies slightly by year/tune)

Engine Code Suffix:

Typically D50B0 or similar for the 125cc Piaggio/Minarelli based engine used in many Derbi models of this era, though specific Derbi codes may apply.

Horsepower:

Around 15-18 HP at 9,000-10,000 RPM (depending on restrictor status/market regulations)

Torque:

Approximately 11-13 Nm at 8,000-9,000 RPM

Carburetor:

Dell'Orto PHBH 28 (common fitment)

Fuel Type:

Unleaded gasoline (RON 95 recommended)

Oil Mixing:

Premix or separate oil injection system (check specific model)

Ignition System:

Electronic ignition (CDI)

Cooling Method:

Liquid-cooled

Exhaust Type:

2-stroke expansion chamber with silencer

🔧 Transmission

Transmission Type:

6-speed constant mesh

Clutch Type:

Wet multi-plate clutch

Final Drive:

Chain drive

📐 Dimensions

Length:

Approx. 1970 mm

Width:

Approx. 720 mm

Height:

Approx. 1110 mm

Wheelbase:

Approx. 1360 mm

Dry Weight:

Approx. 111 kg

Fuel Tank Capacity:

Approx. 13 liters

Front Tire Size:

110/70-17

Rear Tire Size:

130/70-17

Wheel Type:

Alloy wheels

🛡️ Safety Features

Front Brakes:

Hydraulic disc, dual caliper (e.g., 280mm discs)

Rear Brakes:

Hydraulic disc, single caliper (e.g., 220mm disc)

Frame Type:

Aluminum perimeter frame

Suspension Front:

Telescopic fork (e.g., Marzocchi or Paioli, 35mm stanchions)

Suspension Rear:

Monoshock (e.g., Sachs or similar) with adjustable preload

💡 Technology Features

Infotainment System:

Basic analogue and digital instrumentation (speedometer, tachometer, odometer, fuel gauge).

Driver Assistance:

None (typical for this class and era)

Connectivity:

None

🔧 Maintenance

Oil Change Interval:

Refer to specific manual for gearbox oil change (typically every 5,000-10,000 km), 2-stroke oil top-up as needed.

Spark Plug Replacement:

Every 5,000-10,000 km (NGK BR9EG or equivalent recommended)

Air Filter Cleaning:

Every 3,000-5,000 km

Engine Oil Type:

2-stroke oil meeting JASO FD or API TC standards

Coolant Type:

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

Brake Fluid Type:

DOT 4 or DOT 5.1 hydraulic fluid

Known Issues:

Common 2-stroke issues include carburetor tuning sensitivity, potential for carbon buildup in exhaust/cylinder head, reed valve wear. Electrical connections can be a weak point on older bikes. Clutch wear can occur with aggressive use.

Common Maintenance Focus:

Regular cleaning and proper gap setting of the spark plug is crucial for 2-stroke performance. Ensuring the 2-stroke oil delivery system is functioning correctly is paramount.

📚 Vehicle History

Brand Heritage:

Derbi is a Spanish brand with a long history in motorcycle manufacturing, particularly known for its success in small-displacement racing (GP championships) and its sporty commuter and sportbike models.

Model Evolution:

The GPR series is Derbi's line of 125cc sportbikes, characterized by their sharp styling and performance-oriented chassis. The 'NUDE' variants typically featured a more minimalist, naked-style fairing compared to the full-faired 'R' models, though the underlying platform was similar.

Production Period:

The GPR 125 was produced across various iterations from the late 1990s into the 2000s. The NUDE variants were introduced to offer a distinct styling and potentially a slightly different riding experience.