2026

Looking for the 2024 Model? CLICK HERE

300cc

SPANISH ENGINEERING TO CONQUER THE WORLD

 

  MR PRO 300i

The new RIEJU MR PRO 300i MY26 takes Hard Enduro to another dimension. Light, agile and brutally reactive, it is the ideal companion for riders looking to push every challenge to the limit. Underneath its sharp looks beats a 300cc 2-stroke engine with TFI electronic injection, designed and built in Spain, offering precise, punchy and controlled power delivery without sacrificing the essence of the two-stroke.

The new MR PRO doesn't just roar with power: it thinks and adapts. Thanks to its three selectable power maps - Race, Forest and Wet - it responds with precision in any environment. The new diaphragm clutch, electronic exhaust valve and counter-rotating balance shaft ensure smoothness, control and superior stability on even the most technical trails.

Equipped with KYB forks with DLC anti-friction treatment, Renthal Fatbar handlebars, X-Trig Rocs seatpost, Excel tyres with Michelin Enduro Medium, Polisport handguards and a host of premium details, this PRO is pure elite. Light, sophisticated and fierce, it represents the essence of modern Enduro: GO HARD, OR GO HOME.

MODEL HIGHLIGHTS

 

NEW TFI INJECTION ENGINE

MADE IN SPAIN. Thanks to its new and advanced TFI injection system, it is able to perfectly emulate the sensations, response and feel of the 2-stroke carburettor engines, thanks to its innovative system of 2 Bosch Injectors differentiated for High and Low revolutions. All this results in an extraordinary instant and forceful response, combined with the smoothness and efficiency of modern fuel injection engines.

THREE POWER MAPS

3 clearly differentiated Riding Modes as standard, to adapt the power curve to each terrain and riding style, optimizing performance to the maximum: Race Mode (maximum power to feel like a real racer in the chrono), Forest Mode (control and power in equal parts to enjoy any terrain) Wet Mode (smooth and progressive delivery, ideal for low grip conditions).

ELECTRONIC EXHAUST VALVE

A modern electronic exhaust valve automatically manages its opening according to revs and throttle position, for instant and consistent performance at all times and in all conditions.

BALANCE SHAFT

Equipped with a counter-rotating Balance Shaft, it improves engine stability, minimizes vibration and allows the engine to turn smoothly, taking the riding experience to another level.

DIAPHRAGM CLUTCH

More precision, greater control and extraordinary sensitivity. Lighter than traditional models, this clutch provides greater sensitivity and significantly reduces fatigue even in the most demanding conditions.

KYB SUSPENSION

Surgical precision at every impact and outstanding stability on any surface, adaptable to any rider and riding style.
It features a 48 mm KYB Inverted Fork, equipped with AOS (Air-Oil Separated) System and Closed Cartridge with black anodized DLC antifriction treatment, and a KYB Monoshock fully adjustable in Preload, Rebound and Compression (differentiated in High and Low speed), anchored to a progressive linkage system.

Red and black off-road motorcycle with knobby tires
Red and black Rieju MR motorcycle with off-road tires.
Red and black Rieju dirt bike on white background, side view.
Red and black off-road motorcycle with knobby tires
Motorcyclist performing a wheelie on a dirt bike on rugged terrain.
Motocross rider climbing a dirt hill on a red motorcycle in an outdoor setting.
Motorcyclist performing a wheelie on a red dirt bike over rough terrain, wearing black and red gear and a helmet, with a clear blue sky in the background.
Motorcyclist performing trick on a red dirt bike
A motocross rider in red gear jumping on a dirt bike in an outdoor setting.
Motocross rider in red gear jumping over a large tree stump outdoors.
Motorcyclist performing a turn in off-road terrain
A person in red motocross gear riding a dirt bike on a grassy trail, kicking up dirt.
Motocross rider leaning sharply on a red dirt bike, kicking up dirt on a rugged trail.

  • Engine - New 2-stroke single-cylinder TFI (Throttle-Body Fuel Injection) engine

    Injection - 2 specific and differentiated Bosch injectors for high and low revolutions

    Displacement - 298 cc

    Bore and stroke - 72 x 72.52 mm

    Starter - New integrated electric starter

    Cooling - Liquid cooling + Electric fan

    Power maps - 3 Differentiated Power Maps (Race, Forest and Wet)

    Gearbox - 6-speed gearbox

    Clutch - New oil-immersed multi-plate Diaphragm clutch

    Intake - Reed with VForce 4 box

    Exhaust - Rieju Power Racing by OXA

  • Chassis - Chrome-molybdenum central chassis

    Subframe - Detachable aluminium

    Swingarm - Aluminium with Progressive Linkage System

    Front Fork - 48 mm KYB Inverted Closed Cartridge with AOS (Air Oil Separated) system, with Compression and Extension regulation and extra Anti-Friction Treatment DLC anodised in Black.

    Shock - KYB shock absorber with preload, rebound and compression adjustment (differentiated in high and low speed), anchored to Progressive Linkage System

    Suspension travel - Front: 11.8in / Rear: 12.2in

    Seat - Anti-slip with additional grip strips

    Handlebars - 28mm double diameter Renthal Fatbar 802

    Grips - Renthal

  • Front wheel - 1.6x21 spoked EXCEL rim and 90/90-21 Michelin Enduro Medium tyre

    Rear wheel - 2.15x18 spoked EXCEL rim and 140/80-18 Michelin Enduro Medium tyre

  • Front brake - Nissin caliper and pump set and 260mm NG floating disc

    Rear brake - Nissin caliper and pump set and 220mm NG disc

  • Dimensions - Length x width x height: 84 × 32 X 49 in

    Wheelbase - 58 in

    Seat height - 37 in

    Ground clearance - 12.6 in

    Fuel - 2.6 gal

    Dry weight - 228.2 lbs

MSRP: $11,399*

* MSRP does not include freight, setup, tax, title, documentation fees, or dealer installed options. See your dealer for complete details.