Rieju MRX Enduro 50

The Rieju MRX Enduro 50 was manufactured between 2001 and 2008. Designed for genuine off-road use and equipped with the legendary Minarelli AM6 two-stroke engine, the MRX 50 became a staple among fans of light enduro bikes throughout Europe. Its robust construction, steel perimeter frame, and technical equipment designed for off-road use make it an ideal entry-level moped. Additionally, you benefit from a huge and easily accessible range of spare parts and tuning components.

Minarelli AM6 Engine — Technical Specifications

The heart of the Rieju MRX 50 is the Minarelli AM6 Euro 2 engine, a liquid-cooled single-cylinder two-stroke that is among the most popular engines for 50cc geared mopeds. Thanks to excellent compatibility with tuning parts and original spare parts, this engine is one of the most maintenance-friendly and easiest to optimize on the market.

• Model: Minarelli AM6 (Euro 2)
• Engine type: Single-cylinder two-stroke, liquid-cooled
• Displacement: 49.7cc
• Bore x Stroke: 40.3 x 39 mm
• Carburetor: Dellorto PHBN 16 HS
• Starter: Kickstart
• Ignition: CDI
• Spark plug: NGK BR9ES (electrode gap: 0.6 – 0.7 mm)
• Lubrication: Via oil pump (auto-lube)
• Recommended engine oil: Synthetic two-stroke oil for separate lubrication
• Fuel: Unleaded 95 octane (Super)

Rieju MRX 50 Drivetrain and Gearbox

The Rieju MRX 50 features a 6-speed gearbox with a multi-plate wet clutch. This configuration, typical for this displacement class, allows for agile and progressive handling on both paved roads and off-road terrain.

• Number of gears: 6 gears
• Clutch type: Multi-plate wet clutch
• Primary ratio: 71 x 20 (ratio 1:3.55)
• Secondary ratio: 11 x 52 (ratio 1:4.36)
• Chain: 420 x 126 links
• Gearbox oil: SAE 10W40 (quantity: 820cc)

MRX Enduro - Chassis, Suspension, and Brakes

The steel perimeter frame of the MRX Enduro 50 provides a solid base for off-road riding. The front suspension with Paioli telescopic forks and the rear monoshock guarantee appropriate response on uneven ground. The dual-disc braking system ensures effective deceleration in any terrain.

• Frame: Steel perimeter frame
• Front suspension: 35 mm upside-down hydraulic fork
• Rear suspension: Hydraulic monoshock
• Front brake: 260 mm disc brake
• Rear brake: 200 mm disc brake
• Recommended brake fluid: DOT 4
• Front tire: 80/90-21 48P (Enduro) — Tire pressure: 1.7 kg/cm²
• Rear tire: 110/80-18 58P (Enduro) — Tire pressure: 1.8 kg/cm²

RMX 50 - Dimensions, Weight, and Tank

• Overall length: 2,050 mm
• Overall width: 790 mm
• Overall height: 1,170 mm
• Seat height: 920 mm
• Wheelbase: 1,332 mm
• Dry weight: 93 kg
• Tank capacity: 8.4 l

Rieju MRX 50 - Spare Parts and Tuning

The Minarelli AM6 engine is among the engines with the best availability of original spare parts and tuning components on the European market. From cylinders and pistons with larger displacement to racing carburetors, high-end exhaust systems, reinforced clutches, and 420 chain kits, the range for the Rieju MRX 50 is extremely extensive. Whether you are looking for Rieju original parts for a restoration or performance components for your next tuning project, a wide catalog of compatible parts is available for the MRX 50.