2027 TM Racing MX300ES
General Specifications
| Model | TM Racing MX300ES 2T (TM Moto MX 300 ES) |
| Year | 2027 |
| Category | Motocross |
| Engine Type | Single-cylinder, liquid-cooled, reed-valve, 2-stroke engine |
| Weight | 95 kg dry (2026 specification carried forward in 2027 listing) |
Engine
| Displacement | 293.2 cc |
| Bore x Stroke | 72.0 x 72.0 mm |
| Compression Ratio | |
| Fuel System | Keihin PWK 38 mm carburettor | Replacement Options |
| Ignition | Electronic ignition with eMoticom ECU |
| Spark Plug | NGK BKR8EIX (TM UK 2019-onward 250/300cc 2-stroke specification) |
| Spark Plug Gap | 0.7 mm |
| Cooling System | Liquid-cooled with coolant circulation pump |
| Starting System | Electric start standard; optional kick-start |
Transmission
| Transmission | 5-speed manual; optional 6-speed gearbox |
| Clutch | Hydraulically operated, multi-plate wet clutch; revised open-clutch design introduced for 2026 |
| 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 | |
| Rear Tyre | |
Suspension
| Front Suspension | 48 mm KYB inverted telescopic forks, adjustable compression and rebound damping | 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 oil grade, cartridge 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 | 33:1 petrol-to-oil ratio, approximately 30 ml of suitable synthetic racing two-stroke oil per litre of petrol, according to TM UK 250/300cc carburettor-model guidance | Premix Calculator |
| Gearbox Oil | 650 ml; Motorex Cross Power 4T SAE 10W-40 or 10W-50 required by TM UK for 2026-onward two-stroke MX models with the revised open clutch. Confirm the final fill level against the 2027 owner's manual. |
| Air Filter | Washable, oiled foam air-filter element |
| Service Notes | The 2027 TM Moto MX 300 ES 2T is listed in the manufacturer's official 2027 Japanese model range. It is the 293.2cc carburettor-equipped two-stroke motocross motorcycle, distinct from the MX 300 ES Fi fuel-injected model and the MX 300 ES Fi 4T four-stroke. Published technical specifications are currently carried forward from 2026 pending 2027 updates. Standard equipment includes a Keihin PWK 38 mm carburettor, eMoticom ECU, electric starter, five-speed gearbox and hydraulically operated wet clutch. A six-speed gearbox and kick-start are optional. Front suspension travel is 310 mm and rear travel is 300 mm. TM UK specifies NGK BKR8EIX spark plugs with a 0.7 mm electrode gap for 2019-onward 250/300cc two-strokes. Use Motorex Cross Power 4T 10W-40 or 10W-50 gearbox lubricant with the newer open-clutch assembly to prevent clutch slippage and overheating. Inspect the air filter, cooling system, carburettor, piston, exhaust power valve, drive chain and suspension linkage regularly. Confirm 2027-specific tyre sizes, fork oil quantities and any revised technical specifications against factory documentation. |
2027 TM Racing MX300ES – Traditional Carburettor Power Meets Italian Motocross Engineering
The 2027 TM Racing MX300ES continues the Italian manufacturer's distinctive approach to large-capacity two-stroke motocross. Now sold under the TM Moto name, the MX 300 ES combines a 293.2cc liquid-cooled engine, Keihin PWK carburettor, electric starting and an aluminium chassis. It offers riders a traditional mechanically adjustable alternative to electronically fuel-injected motocross motorcycles.
The 2027 model continues the established platform rather than introducing a confirmed completely new generation. TM Moto Japan lists the motorcycle in its 2027 range, although its published technical figures currently reflect the 2026 specification. The engine retains its 72 mm bore and stroke, while the five-speed gearbox can be replaced with an optional six-speed transmission. Electric starting is standard, with kick-start available as an option.
One of the MX300ES's defining features is its 38 mm Keihin PWK carburettor. Unlike the fuel-injected MX300ESFI, the carburettor model allows experienced owners to adjust jetting and needle settings for track conditions, temperature and altitude. Correct fuel mixture is particularly important on a high-performance two-stroke, where excessively lean jetting can cause serious engine damage. The MXOwners carburettor identification and replacement guide provides additional information about conventional off-road carburettors.
The aluminium Deltabox-style chassis combines 48 mm KYB inverted forks with a linkage-operated TM Moto rear shock. Published suspension travel is 310 mm at the front and 300 mm at the rear. Rider sag, spring preload and damping adjustments remain important for adapting the motorcycle to different track conditions. Owners can consult the MXOwners rear suspension setup guide for general adjustment principles.
Routine maintenance includes air-filter cleaning, carburettor inspection, gearbox oil changes, cooling-system checks and scheduled piston and power-valve servicing. TM UK recommends a 33:1 fuel mixture for its carburettor-equipped 250cc and 300cc two-strokes. The MXOwners two-stroke premix calculator helps owners calculate the required oil quantity when preparing fuel. With its conventional carburettor, electric starter and specialist Italian chassis, the 2027 MX300ES continues to appeal to riders who appreciate the mechanical character of a competition two-stroke.
