Question about TM Racing MX 125 Motorcycles

2 Answers

Hi ive got a tm 125 98 - 99 model, my mate kx 100 races me on the stretch and i was thinking,what would the best to do as im missing 1 st gear should i do a full engine rebuild with racing pistons and reeds and do you know any shop that rebuilds these engines and where can i get the parts, hop i hear back from you as i really need help thanks.

Posted by on


2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 148 Answers

You dont need racing piston,,get the first gear fixed,some v-force3 reeds and a good pipe and you will blow the kx into the weeds

Posted on Mar 19, 2011

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

You don't need vforce reeds that bike has ridiculous speed and torque for 125 you'll probably beat him without first gear. haha

Posted on Oct 26, 2012


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What's the best tyre pressure for tm 125 mx?

2002 TM Racing MX 125 Tire pressure - Questions - Fixya > ... > TM Racing > MX 125 > 2002 TM Racing MX 125
Free help, troubleshooting & support for 2002 TM Racing MX 125 tire pressure related topics. Get solutions for 2002 TM Racing MX 125 tire pressure related ...

Sep 10, 2015 | Motorcycles

1 Answer

Ive got a kx 100 big wheel ive done the crank bearings and re-assembled i have got compression and spark but it wont run also theres no gears can any1 help me please as im sick of it ha ha

your gearbox has proberlly gone, take the case off and check the teeth out on the cog and the hook that grabs the gear, check that the fuel is going through

Aug 07, 2013 | Motorcycles

1 Answer

09 TM EN 300,after the bike is warm and ridden for around an hour or so,it splutters and misses under quarter throttle intermittantly..Clean carby jetted well..Electrical issue im thinking?Anyone...

Check the gap on the points and check to see if they're pitted or burnt. You might just need to clean them with some emery cloth or something similar. If they're pitted or burnt, they need to be replaced

Jun 18, 2011 | TM Racing EN 300 Motorcycles

1 Answer

I have a TM 250 around 2000 model. i swapped it for my gas gas txt 280 with someone local. he had bike running fine then water got into stator and so messed up and burnt out stator. he cut wires off...

Hi, Cal_h and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, needs to be 12.5 volts or better and be able to pass a "LOAD" test, your battery may show 12.5 volts but has little or zero amps and must be replaced.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting, leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or CDI or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Tm racing 400 no spark
How to fix No Spark Problem on Motorcycles and Dirt Bikes
TM Racing service manuals page 1
TM Racing Manuals Spare Parts Manuals Exploded Diagrams
TM RACING 250Fi EN Use And Maintenance Manual

Apr 06, 2017 | TM Racing Mx 250 Motorcycles

1 Answer

What gearbox oil is recommended for my 2000 TM racing mx 125

I would only use ATF Type F (Automatic Transmission Fluid) in the TM gearbox mate. Alot of folk use light gear oil, but in my experience, it just isnt up to standard whilst ragging the nuts off the engine. All our race bikes (including our TM) use ATF, and we have had no problems.


Mista B.

Sep 26, 2010 | 2002 TM Racing MX 125

1 Answer

Hi im looking for clutch plates and basket that will suit a 02 tm 125 mx and want to know how much this will cost.

Clutch plates vary in price, but if i remember correctly, the TM uses the same as the KX and CR models. Last set i bought cost us 30 pounds. Baskets again vary, best to do a web search but your looking in the region of 100 - 200 pounds for a good one.

Mista B.

Jul 10, 2010 | 2002 TM Racing MX 125

2 Answers

I have a problem again with my 86 kx 80 it dies when i rev it too high also when i drive (im using 30-1 mix but im using two stroke outboard oil)and when i take the sparkpluge out there usualy is a brown...

is it loosing water mate and the mix is 32-1 mate and get some good oil if it loosing water the head gasket has gone if it not this ckeck the jeting on the carb good look

Feb 10, 2010 | 2003 kawasaki KX 125

1 Answer

I have a 2003 kx 250 with full pro circut exhaust im runnin 50:1 whats the best plug to use?

run 40:1 for starter wull seize engine iff not enough oil and the plug use a BR8EG the g stands for racing use or the BR8EIX IRIDIUM PLUG

Oct 08, 2009 | 2003 kawasaki KX 250

1 Answer

I have no spark..thinking coil? also does anyone know what the compression should be on a tm 300 two stroke engine? I am getting 90lbs reading. thanks

Make sure you do the compression with the throttle wide open. (And a clean air filter) You need at least 100 psi to run good. (Kick it untill the gauge needle stops climbing)

Aug 13, 2009 | 2004 TM Racing Mx 300

1 Answer

MY TM 125


The TM 125 uses 550 ml of gear oil. There is level inspection screw situated behind the rear brake lever. Access is a little tricky, but not too tough.
For racing motocross I recomend ATF, but must be changed after each race day.
For enduro, outriding or Sunday riders, BelRay -Trans Oil 80 W is best. You should change oil roughly every 500 km to prolong gearbox life.



Feb 07, 2009 | 2004 TM Racing MX 125

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

299 people viewed this question

Ask a Question

Usually answered in minutes!

Top TM Racing Experts


Level 2 Expert

193 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers


Level 3 Expert

2428 Answers

Are you a TM Racing Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides