2027 TM Racing MX250-4T
General Specifications
| Model | TM Racing MX250-4T (TM Moto MX 250 ES Fi 4T) |
| Year | 2027 |
| Category | Motocross |
| Engine Type | Single-cylinder, liquid-cooled, DOHC, 4-valve, 4-stroke engine |
| Weight | 99 kg dry (published 2026 specification retained in 2027 listing) |
Engine
| Displacement | 249.6 cc |
| Bore x Stroke | 77.0 x 53.6 mm |
| Compression Ratio | 14.0:1 (earlier TM 250 Fi engine specification; 2027 confirmation pending) |
| Fuel System | TM Moto electronic fuel injection with TM Moto throttle body |
| Ignition | Electronic ignition with eMoticom ECU |
| Spark Plug | NGK R0045J-10 (TM UK 250 Fi MX single-pipe reference); NGK R0451B-8 listed for twin-pipe versions. Confirm the exact 2027 engine configuration before fitting. |
| Spark Plug Gap | Not independently confirmed for the 2027 racing plug. Earlier TM 250 Fi service manuals specify 0.8 mm for NGK CR9EIX; do not apply this setting automatically to specialist racing plugs. |
| Cooling System | Liquid-cooled with mechanically driven coolant pump |
| Starting System | Electric start standard; optional kick-start |
Transmission
| Transmission | 6-speed manual gearbox |
| Clutch | Hydraulically operated, multi-plate wet clutch; revised design listed for 2026/2027 range |
| Final Drive | Regina GPX chain drive |
Dimensions
| Overall Length | |
| Overall Width | |
| Overall Height | |
| Wheelbase | |
| Ground Clearance | 355 mm |
| Seat Height | 970 mm |
| Fuel Capacity | 7.5 litres |
Chassis
| Frame | Self-tempering aluminium Deltabox-type single-beam frame incorporating extruded, forged and microcast components |
| Front Tyre | 80/100-21 (typical MX250 motocross fitment; exact 2027 factory tyre not confirmed) | Tyre Size Guide |
| Rear Tyre | 100/90-19 (typical 250cc four-stroke motocross fitment; exact 2027 factory tyre not confirmed) | Tyre Size Guide |
Suspension
| Front Suspension | 48 mm KYB inverted telescopic forks, adjustable damping | Fork Oil Levels |
| Front Suspension Travel | 310 mm |
| Rear Suspension | TM Moto linkage-operated rear monoshock with adjustable preload and damping |
| Rear Suspension Travel | 300 mm |
| Fork Oil | KYB-compatible suspension fork oil; exact 2027 viscosity, cartridge fill quantities and outer-chamber oil levels 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 | Not applicable. Four-stroke engine with separate engine lubrication; do not mix two-stroke oil into the petrol. |
| Gearbox Oil | SAE 10W-50 four-stroke motorcycle engine oil meeting API SM and JASO MA2 specifications is listed in earlier TM 250 Fi workshop documentation. The engine and gearbox share the four-stroke lubrication system. Earlier TM 250 Fi documentation specifies approximately 1.25 litres for an oil change and 1.35 litres after engine overhaul. Confirm 2027 lubricant approval and fill quantity against the current owner's manual. |
| Air Filter | Washable, oiled foam air-filter element |
| Service Notes | The 2027 TM Moto MX 250 ES Fi 4T is officially listed in the manufacturer's Japanese 2027 motocross range. MX250-4T is a shortened model designation; the manufacturer's current designation is MX 250 ES Fi 4T. Published technical figures currently carry forward the 2026 specification pending updated 2027 information. The motorcycle features a 249.6cc fuel-injected four-stroke engine, eMoticom electronic management, six-speed gearbox, electric starting and a hydraulically operated wet clutch. Standard equipment includes 48 mm KYB forks, TM Moto rear suspension, Brembo front brake and Nissin rear brake. Published front and rear suspension travel is 310 mm and 300 mm respectively. The factory lists a 7.5-litre fuel tank, 970 mm seat height and 99 kg dry weight. TM UK identifies different NGK racing spark plugs for single-pipe and twin-pipe 250 Fi MX engines, so confirm engine configuration before ordering. Earlier factory workshop manuals specify SAE 10W-50 engine oil and approximately 1.25 litres for an oil change, but 2027-specific approval and volume must be verified. Maintain the air filter, engine oil, oil filter, valve clearances, cooling system, chain and suspension linkage according to the applicable factory maintenance schedule. |
2027 TM Racing MX250-4T – Italian Four-Stroke Motocross Engineering
The 2027 TM Racing MX250-4T continues the Italian manufacturer's long-running involvement in high-performance four-stroke motocross. Officially marketed as the TM Moto MX 250 ES Fi 4T, the motorcycle combines a 249.6cc liquid-cooled engine, electronic fuel injection and a lightweight aluminium chassis. It offers an alternative to the more familiar Japanese and Austrian 250cc four-stroke motocross machines, retaining the specialist character associated with TM's limited-production motorcycles.
The 2027 model is a continuation of the established MX 250 ES Fi platform rather than a confirmed completely new generation. TM Moto Japan lists the motorcycle in its official 2027 range, although the published technical specifications currently carry forward the 2026 information. The engine retains its 77 mm bore and 53.6 mm stroke, eMoticom electronic management and six-speed gearbox. Electric starting is standard, while a kick-start mechanism remains available as an option.
The MX250's fuel-injected four-stroke engine provides a different riding experience from TM's carburettor-equipped two-strokes. Electronic fuel delivery eliminates routine carburettor jetting adjustments, while the high-revving engine places particular importance on clean intake air, correct engine lubrication and scheduled valve-clearance inspections. Owners searching for replacement components can consult the MXOwners motorcycle parts finder when investigating maintenance and repair options.
Chassis equipment includes a self-tempering aluminium Deltabox-style frame, 48 mm KYB upside-down forks and a linkage-operated TM Moto rear shock. Published suspension travel is 310 mm at the front and 300 mm at the rear. Correct rider sag, spring preload and damping adjustments are especially important on a 250cc four-stroke motocross motorcycle, where maintaining traction and cornering stability helps the rider make effective use of the engine's power delivery. The MXOwners rear suspension setup guide explains the principles of suspension adjustment.
Routine ownership involves regular air-filter cleaning, engine oil and filter changes, valve-clearance inspections and attention to the cooling system and drive chain. Unlike a two-stroke, the MX250-4T uses engine oil to lubricate its internal components and transmission, making the correct lubricant specification and oil level particularly important. With its specialised Italian construction, electronic fuel injection and established racing heritage, the 2027 MX 250 ES Fi 4T continues to offer an individual alternative in the competitive 250cc motocross class.
