2027 TM Racing MX300ES-4T
General Specifications
| Model | TM Racing MX300ES-4T (TM Moto MX 300 ES Fi 4T) |
| Year | 2027 |
| Category | Motocross |
| Engine Type | Single-cylinder, liquid-cooled, fuel-injected, 4-stroke engine |
| Weight | 99 kg without fuel (published 2026 specification carried forward in 2027 listing) |
Engine
| Displacement | 299.4 cc |
| Bore x Stroke | 81.0 x 58.1 mm |
| Compression Ratio | |
| Fuel System | TM Moto electronic fuel injection with TM Moto throttle body |
| Ignition | Electronic ignition controlled by eMoticom ECU |
| Spark Plug | |
| Spark Plug Gap | |
| Cooling System | Liquid-cooled |
| Starting System | Electric start standard; optional kick-start |
Transmission
| Transmission | 6-speed manual gearbox |
| Clutch | Hydraulically operated multi-plate wet clutch; revised clutch assembly introduced for 2026 |
| Final Drive | RK 520 MXU chain drive (2026 factory specification) |
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 and forged components |
| Front Tyre | 80/100-21 (common 21-inch motocross fitment; 2027 OEM size not independently confirmed) | Tyre Size Guide |
| Rear Tyre | 110/90-19 (common 19-inch motocross fitment; 2027 OEM size not independently confirmed) | Tyre Size Guide |
Suspension
| Front Suspension | 48 mm Kayaba (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 48 mm fork-specific suspension oil; exact 2027 oil viscosity, cartridge quantities and outer-chamber fill specifications not independently 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; confirm minimum octane rating in the 2027 owner's manual |
| Premix Information | Not applicable. Four-stroke engine with internal oil lubrication; do not add two-stroke oil to the petrol. |
| Gearbox Oil | Four-stroke motorcycle engine/gearbox lubricant suitable for a wet clutch. Exact 2027 SAE viscosity, oil specification and refill quantity not independently confirmed. Follow factory oil-change and level-check procedures. |
| Air Filter | Washable, oiled foam air-filter element |
| Service Notes | The 2027 TM Moto MX 300 ES Fi 4T is confirmed in the official TM Moto Japan 2027 motocross range. The manufacturer's published specifications currently carry forward 2026 technical information pending updated model-year data. This is the 299.4cc fuel-injected four-stroke motocross model, distinct from the 293.2cc MX 300 ES and MX 300 ES Fi two-strokes. The engine uses an 81.0 mm bore and 58.1 mm stroke, eMoticom electronic management and a six-speed gearbox. Standard electric starting is supplemented by an optional kick-start mechanism. The 2026 generation introduced an updated wet multi-plate clutch. Chassis specifications include an aluminium Deltabox-type frame, 48 mm KYB forks, TM Moto rear suspension, Brembo front brake and Nissin rear brake. Front and rear suspension travel are 310 mm and 300 mm respectively. Factory-published dry weight is 99 kg, fuel capacity 7.5 litres and seat height 970 mm. Verify the 2027 spark plug type and gap, engine oil specification and capacity, front and rear tyre dimensions and KYB fork oil quantities against the factory workshop manual. Maintain the air filter, engine oil, oil filter, valve clearances, cooling system, drive chain and suspension linkage according to the manufacturer's competition maintenance schedule. |
2027 TM Racing MX300ES-4T – Italian 300cc Four-Stroke Motocross Engineering
The 2027 TM Racing MX300ES-4T continues the Italian manufacturer's distinctive approach to four-stroke motocross. Officially marketed as the TM Moto MX 300 ES Fi 4T, the motorcycle combines a 299.4cc liquid-cooled engine with electronic fuel injection, electric starting and a lightweight aluminium chassis. Its unusual displacement places it between conventional 250cc and 450cc four-stroke motocross machines, offering riders an alternative to the familiar classes.
The 2027 model is a continuation of the established platform rather than a confirmed complete redesign. TM Moto Japan lists the motorcycle in its official 2027 range, although the published technical specifications currently carry forward information from 2026. The engine retains its 81 mm bore, 58.1 mm stroke, eMoticom ECU and six-speed gearbox. Electric starting is standard, while a kick-start mechanism is available as an option.
One of the MX300ES-4T's distinguishing characteristics is its position in the four-stroke motocross range. The additional displacement compared with a conventional 250cc engine provides a different approach to engine performance without adopting the full capacity of a 450cc machine. TM's electronic fuel injection manages fuel delivery through a dedicated throttle body, while its compact engine and aluminium frame reflect the manufacturer's competition-focused design philosophy. Owners searching for replacement components can consult the MXOwners motorcycle parts finder.
The chassis uses a self-tempering aluminium Deltabox-style frame with 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 suspension setup remains important for traction, steering response and rider comfort, especially on rough motocross circuits. The MXOwners rear suspension setup and adjustment guide provides additional information about rider sag and suspension adjustments.
Routine maintenance includes regular engine oil and filter changes, air-filter cleaning, valve-clearance checks and inspection of the cooling system, drive chain and suspension linkage. The four-stroke engine requires the correct motorcycle lubricant rather than premixed petrol, and owners should confirm the current factory oil specification and refill quantity before servicing. With its unusual 300cc displacement, fuel-injected engine and specialist Italian chassis, the 2027 MX300ES-4T continues to offer a distinctive choice for riders seeking something different from conventional motocross machinery.
