2026 TM Racing MX250ESFI

2026 TM Racing MX 250 ESFI 2T – Fuel Injection Meets the 250 Two-Stroke

The 2026 TM Racing MX 250 FI ES 2T represents the fuel-injected side of TM's unusual modern 250 two-stroke motocross range. Unlike the visually similar carburettor-equipped MX 250 ES, the FI model uses a TM Moto throttle body controlled by an eMoticom ECU. TM offers both approaches, giving riders the rare choice between traditional carburetion and electronic fuel injection in closely related competition motocross machines.

The engine remains a 249.3 cc two-stroke with a 66.4 mm bore and 72 mm stroke. Electric starting is standard, with kick starting available as an option, while the standard transmission is a five-speed with a six-speed configuration also available. For 2026 the clutch is revised, while the FI system allows electronic control of fuel delivery rather than relying on the jetting changes required by a conventional carburettor.

The FI model shares TM's modern aluminium Deltabox-style chassis philosophy. A 48 mm Kayaba fork provides 310 mm of front suspension travel, while TM Moto's own rear suspension provides 300 mm. The 2026 chassis is an evolution of the platform introduced earlier in the decade rather than a completely new design, with development concentrated on details including rear suspension setup and rider contact points. Owners servicing the front suspension can use the MXOwners fork oil reference when identifying fork service information.

TM's component selection remains distinctive. Brembo equipment operates the 270 mm front brake, while the rear uses Nissin components with a 240 mm disc. The standard fuel tank holds approximately 9 litres, with a 12-litre option available, and the motorcycle weighs 97 kg without fuel. Full-size 21-inch front and 19-inch rear wheels confirm that this is a dedicated motocross machine rather than an enduro derivative; the MXOwners motocross tyre size guide can help when comparing replacement tyre sizes.

What makes the 2026 MX 250 FI ES particularly interesting is that TM has not forced every 250 two-stroke buyer down the same path. The carburettor MX 250 ES remains available alongside this fuel-injected version. From an owner's perspective that distinction is important because the bikes may look almost identical while their fuel-delivery hardware, diagnostics, servicing and tuning requirements are fundamentally different.

The 2026 model is therefore best viewed as a refinement of TM's existing fuel-injected 250 two-stroke platform rather than an entirely new generation. It combines a traditional high-performance two-stroke engine layout with electronic fuel management, electric starting, an aluminium chassis and premium European and Japanese chassis components. For riders interested in modern two-stroke development, having both FI and carburettor 250 motocross models available in the same model year makes TM Racing one of the most unusual manufacturers in the current motocross market.