2027 TM Racing MX250ESFI
General Specifications
| Model | TM Racing MX250ESFI 2T (TM Moto MX 250 ES Fi) |
| Year | 2027 |
| Category | Motocross |
| Engine Type | Single-cylinder, liquid-cooled, fuel-injected 2-stroke |
| Weight | 97 kg without fuel (2026 published specification) |
Engine
| Displacement | 249.3 cc |
| Bore x Stroke | 66.4 x 72.0 mm |
| Compression Ratio | |
| Fuel System | TM Moto electronic fuel injection with TM Moto throttle body |
| Ignition | Electronic ignition with eMoticom ECU |
| Spark Plug | NGK BKR8EIX (TM UK 250/300cc 2-stroke service reference; verify 2027 fitment) |
| Spark Plug Gap | 0.7 mm (TM UK service reference) |
| Cooling System | Liquid-cooled |
| Starting System | Electric start; optional kick-start |
Transmission
| Transmission | 5-speed manual; optional 6-speed gearbox |
| Clutch | Hydraulically operated, multi-plate wet clutch |
| Final Drive | Regina GPX chain drive |
Dimensions
| Overall Length | |
| Overall Width | |
| Overall Height | |
| Wheelbase | |
| Ground Clearance | 360 mm |
| Seat Height | 985 mm |
| Fuel Capacity | 9.0 litres standard; optional 12.0-litre tank |
Chassis
| Frame | Self-tempering aluminium Deltabox-type single-beam frame with extruded, forged and microcast components |
| Front Tyre | 80/100-21 (provisional; confirm factory fitment) | Tyre Size Guide |
| Rear Tyre | 110/90-19 (provisional; confirm factory fitment) | Tyre Size Guide |
Suspension
| Front Suspension | 48 mm KYB inverted telescopic forks | Fork Oil Levels |
| Front Suspension Travel | 310 mm |
| Rear Suspension | TM Moto linkage-operated rear monoshock |
| Rear Suspension Travel | 300 mm |
| Fork Oil | KYB-compatible fork suspension oil; exact 2027 viscosity, chamber volumes and oil-height settings not confirmed |
Brakes & Wheels
| Front Brake | 270 mm hydraulic disc with Brembo caliper |
| Rear Brake | 240 mm hydraulic disc with Nissin caliper |
| Front Wheel Size | 21-inch spoked wheel |
| Rear Wheel Size | 19-inch spoked wheel |
Service Data
| Fuel Type | Premium unleaded petrol; minimum 97 RON recommended by TM UK |
| Premix Information | Confirm the 2027 EFI lubrication arrangement and manufacturer-specified oil requirements before refuelling. Do not assume that the carburettor model's premix ratio applies. | Premix Calculator |
| Gearbox Oil | Motorex Cross Power 4T SAE 10W-40 or 10W-50 recommended by TM UK for newer two-stroke MX clutch systems. Earlier published 250/300cc gearbox capacity: 650 ml; confirm the 2027 fill quantity before servicing. |
| Air Filter | Washable, oiled foam air-filter element |
| Service Notes | The 2027 MX 250 ES Fi 2T is listed in the official TM Moto Japan 2027 range. The manufacturer's published technical table currently carries forward 2026 specifications pending 2027 updates. This model is the fuel-injected 249.3cc two-stroke motocross motorcycle, distinct from the carburettor-equipped MX 250 ES and the four-stroke MX 250 ES Fi 4T. Standard equipment includes electric starting, five-speed transmission, eMoticom ECU, hydraulic wet clutch and 48 mm KYB forks. A six-speed transmission and kick-start are optional. Published suspension travel is 310 mm front and 300 mm rear. NGK BKR8EIX with a 0.7 mm gap is identified in TM UK 250/300cc two-stroke service guidance but requires confirmation for this exact model year. Verify tyre fitment, lubrication configuration, gearbox oil quantity and fork oil specifications against the 2027 factory manual. Maintain the air filter, cooling system, drive chain, piston, exhaust power valve and suspension linkage according to the manufacturer's service intervals. |
2027 TM Racing MX250ESFI – Fuel-Injected Italian Two-Stroke Motocross
The 2027 TM Racing MX250ESFI continues the Italian manufacturer's distinctive approach to two-stroke motocross. Now marketed under the TM Moto name, the MX 250 ES Fi combines a 249.3cc liquid-cooled two-stroke engine with electronic fuel injection, electric starting and a lightweight aluminium chassis. The motorcycle provides an alternative to mainstream Japanese and European competition machines while retaining TM's specialist racing identity.
The 2027 model is a continuation of the existing generation rather than a confirmed complete redesign. TM Moto Japan lists the motorcycle within its 2027 motocross range but currently publishes technical specifications carried forward from 2026. These include a 66.4 mm bore, 72 mm stroke, eMoticom ECU and five-speed gearbox, with a six-speed transmission available as an option. The electric starter is standard, while a kick-start mechanism can be specified separately.
Electronic fuel injection distinguishes the MX250ESFI from TM's carburettor-equipped MX250ES. Instead of relying on conventional carburettor jets and needles, fuel delivery is managed electronically. This changes the approach to troubleshooting and maintenance, making electrical connections, sensors and fuel-system condition particularly important. Owners searching for compatible replacement components can use the MXOwners motorcycle parts finder as a starting point.
The chassis combines TM's aluminium Deltabox-style construction with 48 mm KYB upside-down forks and a TM Moto rear shock. Published suspension travel is 310 mm at the front and 300 mm at the rear. Correct spring preload, rider sag and damping adjustments remain important for maintaining traction and stability. The MXOwners rear suspension setup guide explains the principles behind these adjustments.
For owners maintaining the 2027 MX250ESFI, attention should focus on the air filter, cooling system, fuel-injection components, gearbox lubrication and normal two-stroke top-end inspections. The precise 2027 lubrication arrangement and service quantities should be checked against factory documentation before maintenance. Although the published specifications remain closely related to the preceding model, the MX250ESFI continues to offer an unusual combination of specialist Italian engineering, electronic fuel delivery and traditional two-stroke motocross performance.
