🏷️ Basic Information

Make:

Derbi

Model:

GPR DRD RACER XTREME 50

Model Variant:

Racer Xtreme 50cc 6-speed

Engine Type:

50cc 2-stroke (specific engine family not detailed, assumed standard for model)

👋 Introduction

Segment:

Performance-oriented 50cc sportbike, targeting younger riders and enthusiasts.

Competitors:

Other 50cc sportbikes from brands like Aprilia (RS 50), Yamaha (DT50), Beta (RR 50), Rieju (RS Sport), MBK (X-Power), Gilera (GSM 50, SMT 50).

Design Philosophy:

Emulates larger sportbike styling with performance-focused components for its class.

Value Proposition:

Provides factory-level technical information for accurate engine maintenance and repair, crucial for preserving performance and longevity.

📋 Manual Details

Primary Focus:

Engine Service and Repair

Model Coverage:

GPR DRD RACER XTREME 50cc 6-speed variants

Total Pages:

71

Type:

Factory Engine Service Manual

Language:

English (ENG)

File Format:

PDF

📖 Manual Coverage

Engine Internal:

Cylinder, Piston, Rings, Crankshaft, Connecting Rod, Bearings, Seals, Gaskets, Cylinder Head

Engine External:

Carburetor, Intake System, Exhaust System, Ignition System (CDI, Coil, Spark Plug), Cooling System (if applicable, though typically air-cooled for 50cc 2-stroke), Clutch, Kick-starter Assembly

Lubrication System:

Oil Pump (if separate), Oil/Fuel Mixture (pre-mix if applicable), Transmission Oil System

Disassembly Reassembly:

Complete engine teardown and reassembly procedures detailed with visual aids.

Maintenance:

Routine checks, adjustments, and scheduled service tasks relevant to engine operation.

Troubleshooting:

Diagnosis of common engine problems and step-by-step solutions.

Repair:

Component replacement and repair for worn or damaged engine parts.

Diagnostics:

Engine performance analysis, compression testing, and ignition timing checks.

Depth:

Comprehensive, covering all aspects of engine service and repair from basic maintenance to full rebuilds.

📊 Manual Specifications

Quality:

GOOD QUALITY

Printability:

FULLY PRINTABLE

Searchability:

Likely text-searchable PDF due to 'fully printable' and inclusion of diagrams.

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

Visuals:

Abundant images and illustrations detailing procedures.

Diagrams:

Includes wiring diagrams (likely for electrical components related to ignition/starting) and system diagrams.

⚙️ Engine Specifications

Engine Family:

Likely a variant of Minarelli AM6 or a similar liquid-cooled, 6-port 2-stroke engine (common in this class, though specific designation not provided).

Displacement:

49.7cc (standard for 50cc class regulations)

Bore X Stroke:

Typically around 39.5mm x 40.2mm for this engine type (specifics would be in manual).

Cooling System:

Likely Liquid-Cooled (for 'Racer Xtreme' designation suggesting higher performance).

Horsepower Output:

Typically around 2-4 HP at RPM, subject to European 50cc moped regulations. Performance upgrades are common.

Torque Output:

Low-end torque characteristic of small displacement 2-strokes, crucial for initial acceleration.

Carburetor:

Likely a 12mm to 19mm carburetor (e.g., Dell'Orto PHBG series), specified in the manual.

Fuel Delivery:

Gravity feed from fuel tank.

Fuel Type:

Unleaded gasoline, typically 95 RON (Euro standard), mixed with 2-stroke oil.

Ignition Type:

Electronic Ignition (CDI - Capacitive Discharge Ignition).

🔧 Transmission

Gearbox:

6-speed Manual Sequential Transmission.

Clutch Type:

Wet, Multi-plate clutch, operated via hand lever.

Transmission Oil Type:

Typically SAE 10W-30 or SAE 75W-90 API GL-3 or GL-4 gear oil (specific grade and capacity in manual).

📐 Dimensions

Length:

Approx. 1900-2000 mm (typical for class, specific to model variant).

Width:

Approx. 700-800 mm (handlebar width).

Height:

Approx. 1100-1200 mm (seat height typically 800-850 mm).

Dry Weight:

Approx. 90-105 kg (typical for class).

Fuel Tank Capacity:

Approx. 10-13 Liters.

🛡️ Safety Features

Safety Certification:

CE certified for European markets. Specific crash test data not typically available for 50cc mopeds.

Braking System Front:

Disc brake (typically single disc, hydraulic actuation).

Braking System Rear:

Disc brake (typically single disc, hydraulic actuation).

Lighting:

Headlight, Taillight, Turn Signals, Brake Light, compliant with road regulations.

Instrumentation:

Speedometer, Odometer, Tachometer, Fuel Level (optional), Neutral Indicator, Turn Signal Indicators.

💡 Technology Features

Instrument Cluster:

Analog or digital-analog mix with essential readouts for speed, RPM, indicators, and possibly a basic LCD for odometer and trip meter.

ABS:

ABS is typically not fitted on 50cc mopeds of this era.

Usb Charging:

Unlikely to be standard equipment on this model's original specification.

🔧 Maintenance

Oil Change Transmission:

Typically every 3,000 - 5,000 km or annually (refer to manual for exact interval and capacity).

Spark Plug Replacement:

Every 5,000 - 10,000 km, depending on plug type (e.g., NGK BR9EG is common).

Air Filter Cleaning:

Every 2,000 - 4,000 km, more frequently in dusty conditions.

Carburetor Cleaning:

As needed, typically when performance issues arise or at larger service intervals (e.g., 10,000 km).

Coolant Type:

Ethylene glycol based coolant, 50/50 mix with distilled water (if liquid-cooled). Specific type and capacity in manual.

2 Stroke Oil Type:

High-quality 2-stroke synthetic or semi-synthetic oil, specifically for liquid-cooled engines, mixed at a ratio specified by Derbi (often 1:25 or 1:50 with gasoline).

Common Problems:

Carburetor jetting issues, CDI unit failures, wear on starter mechanisms, radiator leaks (if liquid-cooled), exhaust carbon buildup, clutch slipping due to wear or improper adjustment.

Cylinder Head Torque:

Specific torque values for cylinder head bolts, spark plug seating, and other critical fasteners would be detailed in the manual.

📚 Vehicle History

Derbi History:

Derbi is a Spanish manufacturer with a long history in small-displacement motorcycles and scooters, known for its racing heritage in lower classes.

Gpr Series:

The GPR series represents Derbi's line of faired sportbikes, with the 50cc versions being accessible entry points into this style. The DRD (Dakar Replica) designation often signifies an off-road or dual-sport influence, but on the GPR, it likely refers to a more aggressive styling or chassis setup. The 'Racer Xtreme' specifies the performance-oriented variant.

Manufacturing Location:

Primarily Spain (historically), now part of the Piaggio Group (Italy).

🏆 Awards & Recognition

Brand Recognition:

Derbi GPR series is well-regarded in the 50cc segment for its sporty styling and handling, often winning peer comparisons for aesthetics and chassis dynamics in its class.

Emission Standards:

Compliant with relevant European emission standards for 50cc mopeds at the time of manufacture.