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Engine
Hand finished crankcases with ‘water cooling’ of the crankshaft area of the engine cases. Lightweight and strong die-cast clutch casing, clutch inspection, water pump and ignition covers. Aluminium water pump rotor. Billet machined crankshafts running on roller bearings with ‘hi-tech’ crank-seals. Machine finished treated con-rod. Friction reduction coated pistons. High performance – long lasting clutches. ‘Cush-drive’ clutch baskets. Friction reduction hard coated gearbox selector fork tips. Hardened / treated gear-shaft parts (revised main shaft), 6 speed gearboxes with differing low/top ratios for MX /EN models. V-Force reed blocks. Hydraulic clutch actuation. Keihin carburettors. Emoticon controlled ‘TBi’ fuel injection systems. High performance exhaust systems. TMEES electronic exhaust valve control. Kokusan digital variable advance ignitions.
The legendary TM Racing 125cc and 144cc 2-stroke engines are synonymous with performance. Combined with some incredible technical innovations, the latest evolution of engines are designed and constructed from some of the best materials and feature some of the best ancillary components available as standard fitment. TM Racing have created small capacity engines with outstanding power characteristics, greater than their actual capacity would suggest, alongside superb reliability to give class leading performance from the outset time and time again. Both the 125cc and 144cc variants have received small, but significant, revisions for the new model year in terms of engine set-up. These new changes work alongside updated electronic programming designed to maximise the performance of the engine in all guises. The TMEES electronically controlled exhaust valve with a direct drive ‘rod’ system remains, a well-proven and reliable system which was a welcome update to these small capacity engines. The ‘direct-drive’ TMEES system gives better response with a gain in power/torque at the lower range whilst strengthening the mid / top end performance of the engine. The TMEES system electronics have been profiled to work seamlessly with the engine electronics to ensure power, torque and responsiveness is always at its best for each given discipline. On the 125cc / 144cc EN and SMR ‘Fi’ variants the new TBi fuel injection systems will feature a host of new changes specific to these models.
Frame
The high-end specification of all TM Racing machines is well-versed and this model year is no exception. The specification list for a ‘production machine’ is vast and features numerous high-quality components throughout. For 2024 we have several small changes and revisions to further enhance the ‘new for 2022’ chassis that was already designed to improve handling, weight balance, overall machine weight (reduced), rider ergonomics and the visual look. All variants chassis’ and sub-frames will once again be constructed using aluminium, with each engine ‘capacity’ / variant having a chassis unique to that engine displacement. This ‘tailoring’ of the chassis to engine allows TM Racing to design and build each machine for minimal weight, compactness, and better handling characteristics with mass centralisation specific to each model whether 2-stroke or 4-stroke. All chassis are constructed using the latest design elements that reduce overall chassis weight whilst maintaining maximum strength, matched to new revisions in chassis geometry / triple clamp angles that are specifically tailored to each model once again, allowing the best in handling characteristics for each model in the range. On all models, the now standard fitment KYB 48mm twin chamber fork, will continue to adopt the latest generation of internal friction reduction ‘coatings’ with some revised settings from 2023. These latest generation forks are designed to give improved response for faster changes to the terrain, all still controlled by the more favourable spring and oil set-up which is still proving to give greater reliability and more consistent performance. The TM Racing shock absorber, made in house by the TM racing technicians, has seen some large internal changes over the last 2 years and will still adopt this latest ‘seal’ system designed to reduce friction and increase shock performance. Combined with the latest swing-arms, linkage components and spindle diameters to limit and ‘control’ flex, the shock allows for a more progressive feel, giving improved track stability and maximising traction. The chassis and suspension components work together to achieve incredible handling characteristics on a multitude of surfaces, allowing for greater stability in all conditions, increasing traction and inspiring greater confidence to reduce lap-times. The aesthetic look of the machines will remain as per 2023, where the latest chassis generation is not only ‘form’ but ‘function’, reducing the width of the bike reduced by 3cm to create a slimmer machine with better rider ergonomics and more freedom of movement. The current appearance of the latest generation model range is still one of the most striking to date, a mix of angles and curves that blend seamlessly into each other from front to rear. Beautiful, yet aggressive in its shaping, the body panels will feature a new decal scheme for 2024 incorporating some brighter colour accents giving a more striking visual appearance.
‘FRESH AIR SYSTEM’: All TM Racing adult 2-Stroke models feature the ‘Fresh Air’ intake system which allows the engine air filtration system to breathe cleaner air, this system reduces particulate contamination of the air filter maximising power for longer duration. Air is channeled from the intake vents – via the radiator panels and fuel tank – to the airbox which houses a large volume air filter. The ‘Fresh-Air’ system also brings another added advantage in the form of a lower centre of gravity, with the fuel tank now positioned slightly further into the chassis around the engines cylinder, this ‘weight’ shift, combined with the latest frame geometry and suspension, all work harmoniously to maximise the handling characteristics of each machine. The 4-Stroke machines also continue with ‘reverse’ layout, which sees the fuel tank moved under the seat area whilst the engine intake and filtration system is now positioned above the engine. This allows the 4-Stroke engine to breathe cleaner air with a much more direct air feed into the Fi throttle body, filter contamination is decreased whilst engine performance and response is maximised. This chassis layout witnessed a huge transformation to the complete range of 4-stroke model machines, with the centre of gravity lowered further into the chassis, especially when noting that each capacity model has its own main chassis unique to a specific engine base. TM Racing have created a line of incredibly nimble and agile machines, better handling characteristics, turning, stability and weight losses were seen throughout the current chassis guise as well as gains in engine performance.
WHEELS: The CNC machined billet aluminium hubs, laced to anodized Excel rims, feature the latest spoke arrangement with a ‘tapering’ design profile in a stronger material, a material treated to increase corrosion resistance, larger spoke nipples feature on the front wheel also for added strength. The wheel configuration allows for the best in strength and durability of the wheel components whilst reducing the un-sprung weight by a small margin. The CNC machined hubs, featuring external dust seals encircling CNC machined wheels spacers to further protect the wheel bearings, are mounted to the suspension components via large diameter hollow spindles. The larger diameter spindles, machined through their centres to lower weight, allow for a more rigid fixing off the wheel reducing the flex and allowing the suspension to work more effectively.
BRAKING SYSTEMS: The braking systems for the TM racing model range has also received some new components in the form of some new options for the SMK range and new Brembo front brake pumps for some adult models. The entire model range continues to feature high quality oversize wave discs working with TM Racing’s ‘mix’ of components. The master cylinders are connected to the brake calipers with lined and braided high quality racing brake lines that are designed to minimise expansion and ensure maximum braking effort is always transmitted to the calipers. This tried and tested collaboration of parts is regarded as one of the best braking systems in many tests and by racers alike. These braking systems keeps performing in the harshest conditions giving great efficiency and inspiring confidence always. The rear brake system is actuated by a twin bearing pivot-mounted, billet machined aluminium foot lever with a replaceable tip.
TRIPLE CLAMPS: The triple clamps fitted to TM Racing motorcycles competition range are CNC machined from block aluminium and each clamp is a work of art. The clamps intricate machining, most of which can only be seen from the underside, gives a structure designed to be supremely strong whilst keeping weight to minimum. The triple clamps also come with an optional ‘damped’ bar mounting system that through a tapering rubber cone arrangement, allow vibrations that can be transmitted through to the handlebar area to be reduced, whilst also allowing some ‘give’ to the bars in the event of a fall reducing the chances of more severe damage occurring to the handlebars and the components adorning them. The handlebars are secured, via the optional ‘damped’ bar mounting system, by billet machined bar clamps, with the top bar clamps featuring a machined TM Racing logo on their upper face.
CLUTCH ACTUATION: All TM Racing machines come fitted with a Hydraulic actuated clutch as standard, the master cylinder, made by Brembo, transmits fluid via a lined and braided hydraulic line to TM Racing’s own ‘slave’ cylinders. With separate slave cylinders for the 85/125/144 engines, the 250/300 engine, the 250Fi/300Fi engines and the 450Fi and 530Fi engines, each unit designed to fit and perform for each model giving a balanced clutch feel between all engine size variants, with both single and dual seal pistons in the slave cylinders depending on model application. The Brembo master cylinders, working with the braided hose that limits hose expansion under extreme load, gives great feel and precise clutch control with great durability when combined with TM Racing’s ‘cush-drive’ (hard coated) clutch baskets, which on all variants 250cc and over, are coated with a hard wearing, friction reduction coating. All clutches are multiple disc ‘wet’ units with multi sprung pressure plates.
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