RX
2T 250

My26
MY27

The perfect blend of extreme agility, responsiveness and race-ready DNA. The RX 250 2T is specifically designed for riders whose riding style is characterised by determination and explosive power. With the updates introduced for MY27, this engine refines its efficiency and smoothness, confirming itself as an excellent choice for those seeking a lightweight, fun and consistently high-performing machine on every section of the track.

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249,3 CC

Displacement

66,4 mm

Bore

100 kg

Dry weight

340 mm

Ground clearance

Main features

ENGINE

NEW LONGER FINAL DRIVE RATIO

The RX 250 2T’s final drive ratio has been changed from the previous 13/50 to the new 14/51 configuration. This targeted lengthening of the final drive results in a much smoother and more effective overall power delivery. The benefits are clearly noticeable both on the fastest sections of the track and when exiting corners, situations where the rider requires optimal traction and constant support for power delivery.

CHASSIS

MECHANICALLY ROBUST SILENCER

The exhaust system, designed for intensive motocross use, has been structurally optimised in its internal components. The adoption of a new, more robust tapered pipe increases resistance to stress and ensures the structural stability of the silencer even under the most demanding conditions. This upgrade allows the exhaust’s performance and behaviour to remain completely uniform and consistent over time.

CHASSIS

DUNLOP TYRES AND ADVANCED HANDLING

The RX 250 2T’s chassis package is enhanced with new-generation Dunlop tyres. Designed to offer maximum efficiency in terms of grip and traction, these tyres are lighter than the previous version. The reduction in unsprung mass directly affects the bike’s dynamic behaviour, enhancing handling and making the bike even more agile and precise when changing direction.

CHASSIS GEOMETRY

The chromium-molybdenum frame retains the successful geometry of the previous model, developed to offer an optimal balance between stability at high speeds and manoeuvrability.

RED AND BLACK AESTHETICS

The graphic design marks a decisive evolution, introducing an aggressive red and black livery that harmonises visually with the black-finished frame and tank.

SOFT-COMPOUND GRIPS

New soft-compound grips engineered to absorb vibrations, ensure a firm grip and reduce fatigue in the hands and forearms.

REINFORCED CHAIN GUIDE

High-strength chain guide, designed to withstand impacts in deep ruts and protect the chain from constant stress.

REDESIGNED PINION GUARD

New, wider and more robust pinion guard, developed to ensure total protection against debris and full compliance with strict competition regulations.

KYB SUSPENSION

48 mm sealed cartridge front fork and 50 mm Kayaba monoshock with dedicated settings to suit the weight and responsiveness of the 2-stroke chassis.

NISSIN BRAKING SYSTEM

Nissin floating brake calipers paired with 260 mm Galfer wave disks at the front and 240 mm at the rear, for incisive and modulated braking power.

ALUMINIUM SUBFRAME AND TOOL-FREE AIRBOX

A lightweight rear subframe with just the right amount of stiffness, featuring intuitive, tool-free access to the air filter located on the left side.

LIGHTWEIGHT DRIVETRAIN AND MOUNTS

O-ring-free racing chain to maximise smoothness; handlebars mounted on silent blocks with 5 mm raised supports to improve comfort.

POWER DELIVERY AND CONTINUITY:
THE NEW 14/51 GEAR RATIO

The RX 250 2T makes responsiveness its absolute strong point. All its components work in perfect harmony, combining the structural lightness of the parts with the engine’s responsiveness and the progressive tuning of the Kayaba suspension, eliminating traction loss and offering the rider a lightning-fast yet incredibly linear response during acceleration and on high-speed sections. Explore the bike in every single technical detail through the 360° view.

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manual brochure Tech Specs

CHASSIS

Frame

Molybdenum steel with double cradle split above the exhaust port

Wheelbase

1482 mm

Max length

2177 mm

Max width

830 mm

Max height

1260 mm

Seat height

945 mm

Ground clearance

340 mm

Footrest height

422 mm

Dry weight

100 kg (front 48 kg; rear 52 kg)

Fuel tank capacity

7,0 l

Cooling system capacity

1,3 l

Front suspension

Kayaba Hydraulic USD closecartridge fork with ø 48 mm shaft

Rear suspension

Kayaba Monoshock with progressive compound lever

Shock absorber stroke

133 mm

Front wheel travel

305 mm

Rear wheel travel

300 mm

Front brake

Wave disc ø260 mm and double-piston floating caliper

Rear brake

Wave disc ø240 mm and single-piston floating caliper

Front rim

21 x 1,6 – 36 holes

Rear rim

19 x 2,15 – 36 holes

Front tyre

80/100 – 21

Rear tyre

110/90 – 19

engine

Type

Single cylinder, 2-stroke, liquid-cooled

Bore

66,4 mm

Stroke

72 mm

Displacement

249,3 cc

Compression ratio

14,6:1

Exhaust Valve

BPV system

Starter

Electric starter

Ignition

AC Kokusan – digital CDI

Spark plug

NGK BR8 ECM

Induction system

Induction reed

Lubrication

Mixing

Carburettor

Keihin PWK 38

Clutch

Wet multi-disc clutch

Primary drive

Z. 27/72

Transmission

5 gears

Final transmission

Chain

Engine oil

SAE 10W/50

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