2027 Rieju MR 300i Range Specs

Cycle News Staff | September 9, 2026

Rieju renews its MR 300i off-road range with three clearly differentiated 300cc two-stroke versions: Racing, Pro and Hard Enduro, all sharing the same 300cc two-stroke engine with TFI electronic fuel injection, designed and built in Spain.

2027 Rieju MR 300i Range

For 2027, the whole range gains a new LED headlight and a new front mask, giving the MR a fresh look and improving visibility in difficult lighting conditions, along with version-specific graphics and improvements “aimed at sustaining performance in the most demanding moments,” says Rieju.

2027 Rieju MR 300i Racing action
2027 Rieju MR 300i Racing

The MR 300i Racing features Excel wheels with cast hubs and Mitas Terra Force tires, a Power Racing by OXA exhaust system, Neken handlebar and grips, and a Nissin braking system with Galfer discs.

2027 Rieju MR 300i Pro
2027 Rieju MR 300i Pro

The MR 300i Pro features a KYB fork with black-anodized DLC anti-friction treatment, red Xtrig triple clamps, a Renthal Fatbar handlebar, a Power Racing by OXA exhaust, Excel wheels with red machined hubs and Michelin Enduro tires, and Nissin brakes with a floating Galfer front disc.

2027 Rieju MR 300i Hard Enduro wheelie
2027 Rieju MR 300i Hard Enduro

The MR 300i Hard Enduro is the most fully equipped version in the range, conceived specifically for hard enduro. It starts with the same TFI engine and adds its own modifications, featuring an inertia bushing, a heavy-duty water-pump cover with a higher-flow impeller and a model-specific spark plug. The bike is aimed at increasing inertia and low-rev drive in the slowest, most technical sections.

2027 Rieju MR 300i Racing left side
2027 Rieju MR 300i Racing
2027 Rieju MR 300i Pro front
2027 Rieju MR 300i Pro
2027 Rieju MR 300i Hard Enduro left side
2027 Rieju MR 300i Hard Enduro

It also features a reinforced cooling system, with a dedicated expansion tank and a twin electric fan module, which keeps the engine in its optimum window even while riding at slower speeds. Completing the package are a Hard Enduro OXA exhaust, a short final drive ratio with an AXP chain guide, Excel wheels with black machined hubs and Michelin Enduro tires, and Nissin brakes with Galfer Wave discs, the rear one specific to the Hard Enduro.

The Hard Enduro model is also fitted with an array of protection parts.

Available through the official Rieju dealer network.CN

2027 Rieju MR 300i Racing right side

2027 Rieju MR 300i Racing Specifications

Engine 2-stroke single-cylinder w/ TFI
Injection 2 specific Bosch injectors for high and low rpm
Displacement 298cc
Bore x Stroke 72 x 72.52mm
Starting Electric
Cooling Liquid-cooling w/ fan and expansion tank
Power Maps Race, Forest and Wet
Gearbox 6-speed
Clutch Multi-disc diaphragm clutch in oil bath
Intake Moto Tassinari VForce4 reed valve system
Exhaust Rieju Power Racing by OXA
Frame Central spine frame in chrome-molybdenum steel
Subframe Detachable aluminum
Swingarm Aluminum w/ progressive linkage system
Front Fork Inverted KYB 48mm, closed-cartridge w/ AOS system, compression and rebound adjustable
Shock KYB w/ preload, rebound and high/low-speed compression adjustment, linked to progressive linkage system
Front-Wheel Travel 11.8 in.
Rear-Wheel Travel 12.2 in.
Seat Nonslip
Handlebar Neken double diameter 28mm, Neken grips
Front Rim Excel spoked 1.6 x 21
Front Tire 90/90-21 Mitas Terra Force-EF Super Light tire
Rear Rim Excel spoked rim 2.15 x 18
Rear Tire 140/80-18 Mitas Terra Force-EF Super Light tire
Front Brake Nissin caliper and master cylinder w/ 260mm Galfer wave disc
Rear Brake Nissin caliper and master cylinder w/ 220mm Galfer wave disc
Wheelbase 58.07 in.
Seat Height 37.36 in.
Ground Clearance 12.6 in.
Fuel Capacity 2.59 gal.
Dry Weight (claimed) 226.19 lbs.
2027 Rieju MR 300i Pro right

2027 Rieju MR 300i Pro Specifications

Engine 2-stroke single-cylinder w/ TFI
Injection 2 specific Bosch injectors for high and low rpm
Displacement 298cc
Bore x Stroke 72 x 72.52mm
Starting Electric
Cooling Liquid-cooling w/ fan and expansion tank
Power Maps Race, Forest and Wet
Gearbox 6-speed
Clutch Multi-disc diaphragm clutch in oil bath
Intake Moto Tassinari VForce4 reed valve system
Exhaust Rieju Power Racing by OXA
Frame Central spine frame in chrome-molybdenum steel
Subframe Detachable aluminum
Swingarm Aluminum w/ progressive linkage system
Front Fork 48mm KYB inverted fork, closed-cartridge w/ AOS system, compression and rebound adjustable, w/ black DLC anti-friction treatment
Shock KYB w/ preload, rebound and high/low-speed compression adjustment, linked to progressive linkage system
Front-Wheel Travel 11.8 in.
Rear-Wheel Travel 12.2 in.
Seat Nonslip seat with additional grip strips
Handlebar Renthal Fatbar 802 double diameter 28mm, Renthal grips
Front Rim Excel spoked 1.6 x 21
Front Tire 90/90-21 Michelin Enduro Medium tire
Rear Rim Excel spoked rim 2.15 x 18
Rear Tire 140/80-18 Michelin Enduro Medium tire
Front Brake Nissin caliper and master cylinder w/ 260mm Galfer floating wave disc
Rear Brake Nissin caliper and master cylinder w/ 220mm Galfer wave disc
Wheelbase 58.07 in.
Seat Height 37.36 in.
Ground Clearance 12.6 in.
Fuel Capacity 2.59 gal.
Dry Weight (claimed) 228.18
2027 Rieju MR 300i Hard Enduro right side

2027 Rieju MR 300i Hard Enduro Specifications

Engine 2-stroke single-cylinder w/ TFI
Injection 2 specific Bosch injectors for high and low rpm
Displacement 298cc
Bore x Stroke 72 x 72.52mm
Starting Electric
Cooling Liquid cooling w/ dual electric fan
Power Maps Race, Forest and Wet
Gearbox 6-speed
Clutch Multi-disc diaphragm clutch in oil bath
Intake Moto Tassinari VForce4 reed valve system
Exhaust Rieju Power Racing by OXA specific for Hard Enduro
Frame Central spine frame in chrome-molybdenum steel
Subframe Detachable aluminum
Swingarm Aluminum w/ progressive linkage system
Front Fork 48mm inverted KYB fork, closed-cartridge w/ AOS system, compression and rebound adjustable, black DLC anti-friction treatment
Shock KYB shock absorber w/ preload, rebound and high/low-speed compression adjustment, linked to progressive linkage system
Front-Wheel Travel 11.8 in.
Rear-Wheel Travel 12.2 in.
Seat Nonslip with lowered foam and additional grip strips
Handlebar Renthal Fatbar 802 double diameter 28mm, Renthal grips
Front Rim Excel spoked 1.6 x 21
Front Tire 90/90-21 Michelin Enduro Medium tire
Rear Rim Excel spoked rim 2.15 x 18
Rear Tire 140/80-18 Michelin Enduro Medium tire
Front Brake Nissin caliper and master cylinder w/ 260mm Galfer floating wave disc
Rear Brake Nissin caliper and master cylinder w/ 220mm wave disc, 5mm thick, specific for Hard Enduro
Wheelbase 58.07 in.
Seat Height 36.57 in.
Ground Clearance 12.6 in.
Fuel Capacity 2.59 gal.
Dry Weight (claimed) 230.38 lbs.