What category is the 2005 Rieju 50 MRX Castrol?

The 2005 Rieju 50 MRX Castrol has a Category of Cross / motocross.

What is the engine size of the 2005 Rieju 50 MRX Castrol?

The 2005 Rieju 50 MRX Castrol has a Capacity: of 50.00 ccm (3.05 cubic inches).

What type of engine does the 2005 Rieju 50 MRX Castrol have?

The 2005 Rieju 50 MRX Castrol has a Engine type of Single cylinder.

What is the engine power of the 2005 Rieju 50 MRX Castrol?

The 2005 Rieju 50 MRX Castrol has a Power of 8.00.

Is the 2005 Rieju 50 MRX Castrol air cooled or liquid cooled?

The 2005 Rieju 50 MRX Castrol has a Cooling system of Liquid.

How many gears does the 2005 Rieju 50 MRX Castrol have?

The 2005 Rieju 50 MRX Castrol has a Gearbox of 6-speed.

Rieju 50 MRX Castrol - 2005 Specifications and Reviews

Name: 2005 Rieju 50 MRX Castrol
Brand: Rieju

The 2005 Rieju 50 MRX Castrol is a lightweight motocross machine designed for young riders and beginners seeking entry-level off-road performance. Powered by a liquid-cooled 50cc single-cylinder engine producing 8 horsepower, it delivers responsive handling and manageable power suitable for learning fundamental riding skills. Known for its competitive pricing and Castrol sponsorship branding, this cross-styled bike excels in amateur motocross racing and recreational trail riding.

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2005

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Engine and Transmission Specifications
Transmission typefinal drive	Chain
Gearbox	6-speed
Cooling system	Liquid
Lubrication system	Automix
Fuel system	Carburettor. Dell´ortho PHBN 14-12
Bore x stroke	39.0 x 40.3 mm (1.5 x 1.6 inches)
Compression	12.0:1
Power	8.00
Stroke	2
Engine type	Single cylinder
Capacity:	50.00 ccm (3.05 cubic inches)

Physical measures and capacities
Wheelbase	1,332 mm (52.4 inches)
Overall width	800 mm (31.5 inches)
Overall length	2,050 mm (80.7 inches)
Overall height	1,170 mm (46.1 inches)
Rieju 50 MRX Castrol dimensions and frame
Exhaust system	Aluminum silencer
Rear brakes diameter	200 mm (7.9 inches)
Rear brakes	Single disc
Front brakes diameter	260 mm (10.2 inches)
Front brakes	Single disc. 2 piston calipers
Rear tyre dimensions	110/80-18
Front tyre dimensions	80/90-21
Rear suspension	Showa
Front suspension	Showa advantage with inverted bracket
Frame type	Perimetral of double beam in steel.

Speed and acceleration
Fuel capacity	8.40 litres (2.22 gallons)

Category	Cross / motocross
Year	2005
Model	Rieju 50 MRX Castrol
Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

8 hp

Peak Power

Best For

Track30%

City20%

Cornering70%

Daily Riding15%

Touring8%

Passenger5%

Rider Profile

Best For	Best suited to young or novice riders learning motocross fundamentals, though it also serves as a fun, low-stakes plaything for experienced riders on tight tracks.
Purpose	Built purely for off-road motocross practice and light trail riding rather than any kind of road use or commuting.
Rider Fit	Its small 50cc frame and low weight class make it very easy to manage physically, ideal for lighter or smaller riders.
Character	A nimble, high-revving two-stroke minibike that rewards aggressive, playful riding over technical dirt terrain.
Not Ideal For	Not suitable for riders wanting real-world speed, highway travel, comfort over distance, or carrying a passenger.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.