TM Racing 125cc / 144cc Engine with TMEES (Electronic Exhaust-valve System)
TM Racing TMEES (TM Electronic Exhaust System)
Maintaining Your Electronic Exhaust-valve System.
It is advised that the following procedure relating to the set-up and maintainence of your TMEES Engine is used as per instruction on a regular basis to ensure both the performance and reliability of your TM Racing machine is maximised, it should be noted that TM UK recommend the procedure be applied to your machine at 4 hours intervals for MX and prior to each event for Enduro machines.
Please Click On The Link Below To Download The TMEES Set-Up Guide.
TMEES Set-Up Instructions
The above instruction manual has been translated by the TM Racing Staff into English, therefore some of the wording will seem unfamiliar, please see below for an altered translantion of the numbered procedures.
NOTE: The servo unit only needs to be removed from the machine to replace the cables, for simple maintainence and cable adjustment the servo unit can stay attached to the cylinder brace but with it's two fastenings bolts loosened slighlty to allow some movement whilst performing the cable adjustment operation. The domed Allen Key headed bolt in the black moulded plastic cover on the servo unit can be removed to give access to the 4mm postioning hole for locking the servo arm 'pulley reference' hole into place prior to cable adjustment. If the 4mm 'pulley reference' hole in the servo arm is not inline with the 4mm hole in the servo unit's black moulded plastic cover the servo can be moved by gently rotating the cable arm on the cylinder, this will allow the cables to pull on the servo arm rotating the 4mm 'pulley reference' holeinto the correct position for a 4mm locking pin to be inserted. It is advised that the 4mm 'tool' used to lock the servo arms 'pulley reference' hole to the covers 4mm positioning hole be slightly tapered to ease insertion.
1: Cables fitted in the correct position.
2: Cable with red sheath fitted into the lower position.
3: Cable tensioner locking nuts wound back fully allowing the tensioner adjuster to be screwed fully into the servo unit allowing maximium cable movement (fully 'slack').
A: 4mm hole in the servo arm used to lock the servo into place for correct cable adjustment.
4: Black moulded protection cover in place and secured using the 6 screws.
5: Servo Unit installed onto the cylinder brace with the cable tensioner adjuster locking nuts wound back fully with the tensioner adjuster wound fully into the servi unit allowing maximum cable movement (fully 'slack').
6: Pulley referance 4mm postioning hole in the black moulded plastic cover inline with 4mm 'pulley reference' hole in theservo arm, please see 'NOTE' above for instructions on aligning the two holes with the servo unit fitted in place on the cylinder brace.
7: 4mm 'tool' inserted into black moulded plastic cover postioning hole and into 4mm 'pulley reference' hole in servo arm, this locks the servo into the correct position for cable adjustments to be set.
8: fixing the two cables to the cylinders exhaust valve pulley arm.
9: Remove the cylinder's black moulded plastic cover to expose the cylinder exhaust valve pulley arm and cable housings. Lock the cylinder exhaust valve pulley into place using another 4mm 'tool' allowing it to pass through the exhaust valve pulley arm and into the 4mm positioning hole located in the cylinder, this secures the cylinder exhaust valve pulley into the correct position prior to cable adjustment (cylinder exhaust valve pulley 4mm locking hole shown in 'Figure 4')
NOTE: both the cylinder exhaust valve pulley arm and the servo units pulley arm must both be locked into postion to adjust the cables correctly.
10: Adjusting the tension of the pulley cables by means of winding the tensioner adjusters screwed into the servo unit outwards (anti clockwise) removing the 'slack' from the cables.
NOTE: The correct tension of the two pulley cables is set thus, remove the upper cable from it's machined recessed housing in the cylinder and hold it over its housing, whilst pushing the black sheath of the cable gently rearward to ensure the cable is pushed fully home into the cable tensioner adjusters on the servo unit simaltaneously wind the tensioner adjuster outwards increasing the tension until the cable sheath's silver cap at the cylinder end is between 1.5 to 2mm over the fitting face, this ensures the correct cable preloading is set. The cable sheath can then be pulled gently backwards and pushed into the machined recessed housing that secures it. Repeat this procedure with the lower cable.
11: Once the correct tension has been set on the pulley cables the locking nuts on the cable tensioner adjusters of both the upper and lower cables can be wound clockwise against the servo unit body and tightened locking the cable tensioner adjusters into place, please ensure the the cable tensioner adjusters are held securely in position whilst tightening the locking nuts to avoid accidental cable adjustments.
12: Remove the two 4mm 'tools' used to lock both the servo pulley arm and the cylinder exhaust valve pulley arm into place during cable tensioning.
13: Refit the domed Allen Key headed bolt into the pulley reference positioning hole in the servo's black moulded plastic cover.
14: Refit the cylinder pulley black moulded plastic cover and replace the 3 fastenings allen bolt securing it into place.
15: Retighten the servo units two fastenings.
16: Reinstall the 4 rubber protection 'boots' on the two pulley cables into their correct positions to minimise water and dirt ingress into the cables and operating system.
Please ensure the powervalve cables are treated as per any other cable, ensure frequent lubrication of the cables by either a penetrating spray or a designated light cable oil. Also periodic changing of the cables is advised, as with any cable under load, and whilst in a harsh environment, it will eventually fail, if the cable shows any sign of corrosion or fraying of the cable wire strands please replace the cable immediately. TM Racing part No' 64038.
125cc TMEES Engine Carburetion Advice.
Correct fuelling of any engine is of uppermost importance to ensure correct performance and reliability, please ensure that conditions, temperature, elevation and rider ability is taken into consideration when carbureting your machine. Remember that an engine running on a harder surfaced circuit on a warm day will require different fuelling to the same engine on a loose surface circuit on a colder day.
IMPORTANT INFORMATION: The new TM Racing TMEES engine is a high performance competition motor and it is recommended that the larger carburettor main jet sizes are fitted immediatley during running-in and for initial 'hard runs' to give yourself a base setting. As there are so many variables with carburetion settings it is advsable that the possibility of being too 'rich' on fuelling is better than being too 'lean'. This latest generation of TM Racing 125cc engine with the electronic exhaust-valve operation is 'all new' and needs to be treated as such, therefore all known carburetion settings that were employed in the previous engine design are to be discarded, it is advised that a new program of education in fuelling this new engine is devised as it's required fuel quantities at various rpm stages have altered, this shows in the differing needle desigantion and position and jet sizes. Please be advised to start with larger main jet sizes and decrease as required, not the other way round.
Please be advised that is up to you to ensure that you machines engine is running correctly, checking the spark plug during every ride will soon inform you of any changes that may need to be made to your machines carburetion for the conditions. It is advised that you carry a selection of carburettor jets suitable for you machine which will allow you to make any changes should the need arise. NOTE: Incorrect carburetion will lead to poor performance, bad running and even engine failure.
TM Racing 125cc TMEES Engine Standard Settings And Advisories.
PLEASE NOTE: All advisories are for assistance only, you must test and set your machine to the given conditions, Super-unleaded fuel must be used at all times pre-mixed to the correct oil ratio of 33:1 - 40:1 (600ml / 500 ml of quality synthetic oil to 20 Litres of fuel), please be advised that conventional 'regular' unleaded does not meet the higher octane requirements of competition engines and it's use will lead to poor running and even engine failure.
Spark Plug - NGK BR9 EG
Pilot Jet size - 50/52
Advisory: 45 / 48 pilot jets will help low end response if you are using a tickover on the machine.
Main Jet size - 185
Advisory: 190 / 195 / 200 size main jet. We have found during initial UK testing that the engine seems to give better performance on larger main jet sizes as it's efficiency of burning fuel is very good, more fuel and oil also gives more engine safety especially in softer/sandy condtions and/or lower temperatures.
NOTE - conditions, temperature, elevation and rider ability.
Mixture Screw - 1 turn outward (anti-clockwise) from fully closed inwards (clockwise)
Advisory: Mixture can be tested and set as per conditions, 1 turn outward to 1 and 1/2 turns outwards cab bu utilised.
Needle Position - Position 2 (1 up from the bottom - second 'richest' setting)
Advisory: Stock setting adequate for most conditions unless extremly heavy and/or cold where it may be advised to move to position 1 (richest setting) working with changes to main jet size to suit, alternatively extreme hot temperature and/or higher elevation changes could require going to position 3 (mid postion) working with changes to main jet sizings. Also we have available another needle, designated N1EI, that has proven to work in nearly all conditions with the settings of 50 pilot, 195 main, needle clip position 3, mixture set accordingly, BR10EG plug with 1mm washer fitted to lift plug position slightly in combustion chamber.
NOTE: Please ensure correct fuelling at all times, regularly check the engines spark plug colour to ensure your engine is running within the correct parameters, please also take notice of the spark plug advisory relating too temperature. If the machine appears to be running incorrectly please rectify the carburetion or if you cannot do this please stop using the machine immediately and seek advice from your TM Racing dealer.