RX
2T 250

My26
My27

Designed for the MX2 Class and for all riders looking for a 2-stroke with explosive character. Its engine is optimised for maximum performance, from acceleration at the starting gate to the most exciting corner exits.

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249,3 CC

Displacement

66,4 mm

Bore

100 kg

Dry weight

340 mm

Ground clearance

Main features

ENGINE

EXPLOSIVE POWER

The heart of the RX 250 2T is a completely new engine, designed for one purpose only: competition. Unlike the 350, the architecture of this engine is entirely dedicated to the pursuit of maximum performance, with explosive power delivery and exceptional thrust at high revs, just as required for track riding.

NISSIN BRAKING SYSTEM

The Nissin system with 260 mm (front) and 240 mm (rear) Galfer discs ensures powerful and modulated braking. It allows you to precisely manage the 250’s great responsiveness, ensuring decisive braking and total control to maintain maximum speed in corners.

DEDICATED GEAR RATIO

The 13/50 final gear ratio is a specific choice for the 250 2T, designed to enhance its character. Maximum responsiveness and acceleration out of corners, to effectively transfer all the engine’s power to the ground.

Handlebar silent blocks

The silent blocks on the handlebar reduce vibrations and improve comfort. This translates into less fatigue for the rider, who can thus maintain maximum performance for longer.

RADIATORS

Radiators with a reinforced structure are essential for a high-performance engine like the 250 2T. They guarantee optimal cooling even during the most intense use in competition, ensuring maximum reliability when the engine is called upon to give its all.

SINGLE SPARK PLUG HEAD

The choice of a single spark plug head is a key element that defines the character of the 250. This configuration has been developed to maximise performance at high revs, ensuring that explosive power delivery that allows riders to exploit every single horsepower of the engine.

CRANKSHAFT AND CRANKCASE

No compromises: the crankshaft has a dedicated 72mm stroke and the crankcase features internal machining and intake passages with geometries unique to the 250. Each component has been engineered for the specific architecture of this engine.

DEDICATED THERMAL UNIT

The cylinder, piston and exhaust valve have been designed from scratch specifically for this displacement. The valve timing, with dedicated springs, has been finely calibrated to support the responsive and powerful nature of the engine.

KYB SUSPENSION

The bike is equipped with a 48mm KYB fork and a 50mm monoshock, the absolute benchmark in the world of motocross. A dedicated calibration, designed to support the explosive character of the engine and the lightness of the bike, ensuring maximum precision when entering corners and the necessary stability on the most demanding jumps.

AN ENGINE BORN ON THE TRACK

The RX 250 2T engine is not an adjustment, but an entirely new design, developed with a single focus: competition in the MX2 Class. Every single element of the thermal unit has been designed for this engine; head, cylinder, crankshaft, crankcase, and so on. Nothing has been left to chance. The result is explosive power delivery and exceptional thrust at high revs, giving you the maximum advantage anytime, anywhere.

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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 LKAR 8A-9

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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