TM MX 450 Fi 4T 2020

TM Racing MX 450Fi ES

Bore and Stroke: 95X63,4
Displacement: 449,16
Compression ratio: N.A.
Horse power: N.A.
Timing system: DOCH 4 titanium valves
Lubrification: Dry sump with double rotor pump
Fuelling: Battery-less Electronic Fuel Injection, 44mm Throttle body.
Fuel: Super-unleaded
Ignition: Kokusan CDI Electronic with variable advance
Clutch: Multiuple-disk in oil-bath with hydaulic control
Gear: 5 gears
Cooler System: Coolant liquid with pump
Starting: kick start + Electric start
Frame: Perimetral aluminium section
Front fork: Kayaba USD
Rear shock: TM Racing
Front tyre: 90/90X21
Rear tyre: 110/90X19
Front brake: Braking wave Disk 270 mm, with Nissin pump and Brembo caliper
Rear brake: Braking wave Disk 245 mm. With Nissin pump and caliper
Tank: Plastic 8,2 litres

250Fi / 300Fi / 450Fi / 530Fi: 4-Stroke Engines – Single Cylinder, Water Cooled, 4-Valve, Twin Cam, Fuel Injected.

Hand finished crankcases, lightweight and strong die-cast clutch casing, clutch inspection, water pump and ignition covers, cast water pump rotor, billet machined crankshafts (running on roller bearings with ‘hi-tech’ crankseal – 250Fi/300Fi), billet connecting rods, box-bridged pistons with DLC coated gudgeon pics, hand finished cylinder heads, titanium valves matched to copper beryllium valve seats, chain driven overhead twin camshafts actuating ‘finger followers’ on 250Fi/300Fi and ‘valve buckets’ on 450Fi/530Fi, twin rotor oil pump (dry sump type arrangement), high performance – long lasting clutches, ‘cush-drive’ clutch baskets, friction reduction hard coated clutch baskets, friction reduction hard coated gearbox selector fork tips, hardened gear-shaft parts, 5 speed MX / 5 speed EN 450Fi/530Fi – 6 speed 250Fi/300Fi (differing ratio) gearboxes, hydraulic clutch actuation, Battery-less ‘down-draught’ Electronic Fuel Injection, Kokusan digital variable advance ignition with twin map selection working with the fuel injection systems, gear position sensitive variable ignition timing, HGS ‘bomb’ type Exhaust systems. Electric start on EN and Road models, standard fitment on UK MX models and optional on SMX/FT 4-Stroke models models.

The TM Racing range of 4-stroke engines has become legendary for exceptional power delivery and outright performance and durability. The ability of these engines to perform has become renowned worldwide and for a ‘production’ engine the internal components and materials used are unmatched, many of these components and materials being of a level of quality that would only usually adorn the best of the ‘factory’ engine machinery. With an ever-growing list of results globally, in many disciplines, the 4-stroke range of TM Racing engines has spread to accommodate not only the off-road sector, but now feature in other motorsports. We have witnessed the 450cc engine being adapted for the karting sector where its unique lubrication system, working a twin rotor ‘recovery and distribution’ pump with a lower cavity oil chamber for containment that feeds pumped oil to every part of the engine, has allowed this engine to work with the huge cornering g-forces that karts can create where others struggle to lubricate themselves as the oil swells to one side of the engine. TM Racing’s 4-stroke motorcycle range has seen great success over the past seasons, with the SMX 450Fi machine now having taken multiple Supermotard World Championship titles, it currently leads the way once again and has become regarded as the bike to be riding in Supermotard to get the desired results. A purpose designed Supermotard bike that can be bought as a package, ready to thrive in this discipline where others are generally adapted machines created from other models.

The 4-stroke range will retain the current ‘reverse’ chassis configuration with fuel tank under the seat and the air intake above the engine. This layout has seen a huge transformation in the handling characteristics of all the 4-stroke models since it was introduced and has been gradually improved upon year on year. Centralised mass, better outright balance and revisions to the geometry and suspension settings have allowed TM Racing to create and incredible range of 4-stroke machinery all with superb ability and agility. An incredible range of engines matched to an incredible range of chassis, each tailored to a ‘base’ engine, have given TM Racing the ultimate range in 4-stroke machinery, with each model proving itself to be class leading on the world stage in it’s given discipline. The legendary 450Fi engine, that has dominated in its Supermotard guise for a decade, receives only minor updates to some ancillary components and settings for the MX / EN / Road variants, whilst the ‘SMX’ variant will feature a multitude of new additions. The SMX 450Fi 4S engine receives a new cylinder head, with improved porting and twin exhaust system exiting the head itself, alongside a new twin injector throttle body, all working with a new ECU and operating program harmonised to give even greater performance throughout the rpm range. The best just got better.