It is that time of year again, in the world of TM Racing, where technical details of the upcoming 'next year' model range are being released and once again the small Pesarese company have been working hard behind the scenes to bring a full and comprehensive line-up of both 2-stroke and 4-stroke powered machinery in the disciplines of Motocross, Enduro and Supermotard.
For 2013 a host of changes has been applied to TM Racing's already formidable arsenal of competition machines, most notably the addition of a completely new 85cc machine which will feature an aluminium chassis mirroring its larger siblings. This much anticipated new machine has been in development for some time and not only does it feature a new chassis but also a revised powerplant, replacing the older generation steel framed model that has been in production for over a decade but can still run with the best, this new, lighter, more powerful and aesthetically pleasing machine will for sure cause a stir upon its arrival and is destined to be a winner.
Also under constant development is the rest of TM Racing 2-stroke range, TM are still investing heavily in the 2-stroke and are still as enthusiastic as ever to embrace it and improve it and 2013 has been no exception with a brace of changes to the powerplants......
125cc. Once again ever popular and much loved 125cc engines for both MX and Enduro have been revised and improved, starting at the bottom of the engine the 125cc motor will feature new main bearings which will reduce frictional losses and aid crankshaft stability, a new piston has been designed to enhance combustion performance as well as increasing reliability with improved structure in high stress and is joined as always with TM Racing's billet machined connecting rod. A multitude of changes to the intake system have also been applied which include a new air filter cage, a new airbox manifold, a new carburetor manifold and repositioning of V-Force reed valve unit on the crankcases, increasing the performance of the intake system throughout the entire rev range. Programming to the ECU's for both ignition spark timing and operational timing of the electronic powervalve system (TMEES) have also been altered to further enhance the performance of the engine along with alterations to the fueling from the carburetor, all this combined with a new HGS pipe matched to a new HGS silencer make for a new 125cc powerplant that shows significant performance increases in both horsepower and torque throughout the rev range.
144cc. TM have not rested on their laurels with their 144cc engine either and the 2013 engine for MX and Enduro models now shares the same TM electronic exhaust-valve system, that has been proven to be a significant aid in engine performance and control at any given rpm, as fitted to the 125cc engines. The adaption of the TMEES system means the 2013 144cc engine features a totally new cylinder and cylinder head along with the all the other changes that have been made to its slightly smaller capacity brethren, changes including new main bearings tailored to the 144cc specific crankshaft with its own specific billet machined connecting rod. A new intake system featuring a new air filter cage and new manifolds for both the airbox and carburetor, these changes are also matched to a revised position of the V-Force reed valve on the crankcases. New programming to the ECU modules for both ignition spark control and powervalve operation also feature combined with alterations to fueling and carburetion setting. As with the 125cc engine the 144cc powerplant will also feature a new specific HGS pipe and silencer combination all working together to once again give significant performance gains in both horsepower and torque throughout the rev range.
250/300cc. Only minor changes have taken place to the larger displacement 2-stroke machines for 2013 in MX, Enduro and Supermotard trim and these include, a new clutch basket with a friction reducing coating to enhance clutch performance and reduce wear even under the harshest conditions. New clutch fibre plates for better heat dissipation, decreased hook up times and increased durability. Also featuring are alterations to engine timing both electronically via the ECU module and through internal fuel transfer in the crankcases. New cylinder base gaskets for the 300cc machines better matched to the transfer areas on the crankcases and of the larger diameter cylinder. A revised gearbox shifter system is also fitted that includes friction reduction coated selector forks on both front and rear shafts allowing for smoother and more precise gear shifts, finally an improved powervalve mechanism with new bearings allowing for better governor transition for smoother
powervalve control and power delivery. The usual forged piston in the 250cc engine remain as do the V-Force reed valve systems in both 250cc and 300cc variants.
The 4-stroke powerplants have also seen their fair share of modifications for 2013 and with the latest generation 250Fi engine already being improved every year since its inception in 2010 and the 450Fi engine becoming the latest recipient of TM Racing's ultra reliable electronic fuel infection system in 2011, the latest generation 2013 engines have not escaped a host of improvement changes either......
250Fi. For 2013 the incredible 250Fi 4-stroke engine has received several changes, the already highly capable single cylinder, twin cam, finger follower engine has been treated to a new, lighter, yet stronger, billet machined and treated connecting rod matched to a new box-bridged forged piston which improves structure at key points, this new piston increases rigidity and decreases the piston to connecting rod deflection at higher engine rpm's. Lower frictional losses are further achieved by using a new design DLC coated gudgeon pin. A new oil pump is fitted, again billet machined, but now with improved rotors and internal galleries for better flow and oil control at higher oil temperatures. A new friction reduction coated clutch basket is fitted for better clutch performance and wear control, combined with a new clutch plate pack designed for better heat control and greater durability even under the harshest conditions. Along with the mechanical changes there are also some key electrical changes and these include a new wiring harness and a new ECU unit with alterations to both the timing and fueling mapping control parameters of the Efi system allowing easier starting at all temperatures and better performance combined when with the engine changes. The engine still features all of its original high quality components which include, high grade titanium valves matched to copper beryllium valve seats, staged valve springs and hand finished cylinder head porting and crankcases. These changes to the 2013 250Fi engine combine to give greater engine output performance, better clutch performance but also better durability for all components.
450Fi. The mighty 450cc single cylinder, twin cam engine also receives some changes for 2013 and these include a new piston for the MX models, the new piston is forged and features a 'box bridged' design for greater strength in key stress areas and is designed to minimise deflection of the piston to connecting rod giving greater performance and durability. A new design DLC coated gudgeon pin further reduces friction between the piston and connecting rod. Camshaft timing alterations have also been made along with the timing and fueling control of the Electronic Fuel Injection system with new maps programmed into a new ECU. The new ECU is also mated to a new wiring harness and, as its little brother, the 450cc engine also receives a new oil pump, again billet machined but with changes to pump speed and displacement to increase oil control at higher temperatures. Once again the 450 is no exception and the friction reduction coating has also been applied to the clutch basket along with a new fibre plate material, once more aiding clutch performance, heat dissipation, decreasing hook-up time and all whilst giving greater durability. Once again, more engine performance whilst increasing engine component durability.
Obviously there have been a number of aesthetic changes to the machines for 2013, but as mentioned earlier, at this time the images are currently not available, however we can tell you this, the 2013 models will feature a different colour scheme, a new decal design, a new 'optional' Kayaba fork with a new front brake caliper for the MX and EN models, a new swinging arm that is slightly shorter in length, not only reducing overall machine weight but also improving handling and corner stability. On the SMX competion Motard models a new 16.5 inch front wheel will now come as standard fitment over the conventional 17" and there is a new 205mm diameter rear disc available as an option. There have also been and some alterations to some fixings and fastenings around the machines chassis and its ancillary components.
As we have come to expect from TM Racing all the machines are assembled to the highest specification, constructed from the best materials and fitted with some of the best of component parts, these include......
Marzocchi Twin chamber forks / Kayaba Forks, Ohlins / TM Racing shocks, Billet machined aluminium hubs laced to anodised Excel rims, Billet machined aluminium triple clamps, Hydraulic clutches, HGS exhaust systems, Oversize taper bars, quality fixings and fastenings and of course hand finished and assembled engines.
Engines feature include:..billet machined crankshafts, billet machined con-rods, high quality forged pistons, high grade titanium valves, copper beryllium valve seats, V-Force reed blocks, downdraught fuel injection and hand finished castings for better matching and improved flow. It is the combination of these quality components and the care taken to finish and hand assemble these engines that allow all TM machines to perform at the highest level in production trim.
Tel: 01249 715523