2000 Yamaha TDR 125 Logo

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Anonymous Posted on Dec 17, 2011

My yamaha tdr 125 keeps over heating. put new thermostat in plus temperature sensor, water pump is all workin, pipes are all clear, had new gaskets, piston, piston rings the lot done to it but it keeps going up to red line after driving for 5mins, cna any1 help?

5 Related Answers

Anonymous

  • 46 Answers
  • Posted on Feb 16, 2009

SOURCE: oil out of tail pipe

Hi,
This is not uncommon.
Things to check first would be your fuel mixture. You might be running a bit rich. You should be using a mix of 3.5 percent synthetic oil.
Being a 2 stroke, the tail pipe cartridge needs replacing from time to time, as it does collect oil with time. If the bike is a bit noisey change the packing.
Always remember that there is oil in fuel used on 2 strokes.
Lastly check the type of oil you are using. Mineral oil does tend to be a bit messy as the mixture requires around 5 percent oil.
Most off road stores now keep good LOW SMOKE oils such as Motrex.
Stick to good synthetic oils !
Cheers
Jon

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tombones

  • 3567 Answers
  • Posted on Apr 28, 2009

SOURCE: hi there i have a yamaha dtr 125 thats smokes

Assuming you are using two stroke engine oil, the pump is pumping too much into the gas. DO NOT use motor oil in the gas. If 2 stroke oil is being used, then get a new pump, fix the one you have or disconnect the pump and mix the oil with gas when you fill up. Four ounces of 2 stroke oil per gallon of gas equals the standard 32/1 fuel mix.

Anonymous

  • 125 Answers
  • Posted on Oct 22, 2009

SOURCE: How can I fully derestrict a 2008 TDR 125. Bike

Hi,

I suggest to check wether the carburator has a restriction in the holder
check if the clapets (between carb and cilincer) has a restriction
check if the exhaust has a restriction.

But overall: a race-exhaust, a tecnician who personalizes the carb to the local wether conditions by adjusting the jet, an eventually needed unrestriced cdi will improve bigtime.

greetings from a big 2s fan.

Olivier.

Gene Tuck

  • 248 Answers
  • Posted on Nov 21, 2009

SOURCE: I need an owners manual for a Yamaha TDR 125 Do

If you want a service manual you can download a free one at
http://www.yamaha-motor-europe.com/community/service/manuals.jsp
Good luck!

Anonymous

  • 267 Answers
  • Posted on May 06, 2010

SOURCE: need free download service manual for yamaha tdr

http://www.yamahaownershandbook.com.au/index.php

Try this link, Enter: Motorcycle: Model: Year....it has free downloads for most Yammy's, includes adobe reader.
Cheers.

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Related Questions:

1helpful
1answer
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1answer

Overheating and water mixing with oil

You have a gasket leaking from the water jacket into the engine, it is probably at the cylinder flange and you need to check that and replace the gasket. Do not rule out the cylinder head gasket, but that is the less probable place.
0helpful
1answer

In the biginig it wos overheating blow pisten, put new pisten in ect naw theres no spark

to make sure it dont overheat again a good head gasket,,and for the spark check your wiring,,,
0helpful
1answer

WHAT ARE THE TORQUE SPECS FOR A WATER PUMP ON A 2003 CHEVY MALIBU

Water Pump REMOVAL & INSTALLATION CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old. 2.4L Engine
  1. Disconnect the negative battery cable
  2. Detach the Oxygen (O2) sensor electrical connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for a more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break the manifold-to-exhaust pipe spring loaded bolts loose using a 13mm box wrench.
  8. Raise and safely support the vehicle. NOTE: It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  9. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  10. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt. NOTE: DO NOT rotate the flex coupling more than 4°or damage may occur.
  11. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  12. Remove the radiator outlet pipe from the oil pan and transaxle. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  13. Carefully lower the vehicle.
  14. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  15. Remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  16. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces. Fig. 1: Water pump and cover mounting - 2.4L engine 87953070.gif
    To install:
  17. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  18. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  19. Lubricate the radiator outlet pipe O-ring with antifreeze and slide the pipe onto the water pump cover. Install the bolts finger-tight.
  20. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts:19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly: 106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first: 19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover: 125 inch lbs. (14 Nm).
  21. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  22. Raise and safely support the vehicle.
  23. Index the exhaust manifold bolts into the exhaust pipe flange.
  24. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  25. Connect the radiator outlet pipe to the transaxle and oil pan.
  26. Install the timing chain tensioner and front cover.
  27. Install the lower heat shield.
  28. Carefully lower the vehicle.
  29. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  30. Tighten the manifold-to-exhaust pipe nuts to specification.
  31. Install the upper heat shield.
  32. Attach the oxygen sensor connector.
  33. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  34. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine OFF.
  35. Once the vehicle has cooled, recheck the coolant level, then install the radiator cap.
3.1L Engine
  1. Disconnect the negative battery cable.
  2. Properly drain the cooling system into a suitable container.
  3. Loosen, but do not remove, the water pump pulley bolts.
  4. Remove the serpentine belt.
  5. Unfasten the water pump pulley bolts, then remove the pulley.
  6. Remove the five water pump mounting bolts, then remove the water pump. To install: Fig. 2: View of the water pump mounting and bolt tightening specifications - 3.1L engine shown 86883115.gif

  7. Clean all the gasket surfaces completely.
  8. Apply a thin bead of sealer around the outside edge of the water pump along the gasket sealing area, then install the gasket onto the water pump.
  9. Position the water pump on the engine, then tighten the water pump mounting bolts to 89 inch lbs. (10 Nm).
  10. Install the water pump pulley and finger-tighten the pulley bolts.
  11. Install the serpentine belt.
  12. Tighten the water pump pulley bolts to 18 ft. lbs. (25 Nm).
  13. Fill the cooling system.
  14. Connect the negative battery cable, then start the engine. Let the engine run until it reaches normal operating temperature, then check for leaks and coolant level. Add coolant, if necessary, then turn the engine OFF.
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2helpful
1answer

Yamaha dt 125 r 2001, was overheating, i took me rad off and can smell fuel in the rad, ive put a new headgasket on and thermostat housing gasket, cud any1 tell me what else to check,that would of made it...

Your bike is fairly new, the water pump should be fine. But you can see the water moving in the top of the radiator when the cap is off and the thermostat is open, I don't know how you got the gas in there, unless somebody is pulling a prank on you. The head gasket wouldn't do it, you would find oil in there, or water in the oil, but not gas. Gas could leak down through the pump if it was bad and get into the oil.
Fill up your radiator with premixed coolant, and check the fuel lines, filters, shut offs, etc, check the oil for water, gas, and then check the thermostat if nothing else works, it should be closed in cold water and open up when the water gets hot, put it in a pan on the stove and watch it. A thermometer will match the number on the thermostat. like 125 degrees. Or something like that.Hope this helps.
0helpful
1answer

Replacing the water pump

2.4L Engine
  1. Disconnect the negative battery cable
  2. Detach the Oxygen (O2) sensor electrical connector.
  3. Properly drain the engine coolant into a suitable container. Remove the heater hose from the thermostat housing for a more complete coolant drain.
  4. Remove upper exhaust manifold heat shield.
  5. Remove the bolt that attaches the exhaust manifold brace to the manifold.
  6. Remove the lower exhaust manifold heat shield.
  7. Break the manifold-to-exhaust pipe spring loaded bolts loose using a 13mm box wrench.
  8. Raise and safely support the vehicle.

NOTE It is necessary to relieve the spring pressure from 1 bolt prior to removing the second bolt. If the spring pressure is not relieved, it will cause the exhaust pipe to twist and bind up the bolt as it is removed.
  1. Unfasten the two radiator outlet pipe-to-water pump cover bolts.
  2. Remove the manifold to exhaust pipe bolts from the exhaust pipe flange as follows:
    1. Unscrew either bolt clockwise 4 turns.
    2. Remove the other bolt.
    3. Remove the first bolt.

NOTE DO NOT rotate the flex coupling more than 4° or damage may occur.
  1. Pull down and back on the exhaust pipe to disengage it from the exhaust manifold bolts.
  2. Remove the radiator outlet pipe from the oil pan and transaxle. Leave the lower radiator hose attached and pull down on the outlet pipe to remove it from the water pump. Leave the radiator outlet pipe hang.
  3. Carefully lower the vehicle.
  4. Unfasten the exhaust manifold-to-cylinder head retaining nuts, then remove the exhaust manifold, seals and gaskets.
  5. Remove the front timing chain cover and the chain tensioner. For details, please refer to the procedure located later in this section.
  6. Unfasten the water pump-to-cylinder block bolts. Remove the water pump-to-timing chain housing nuts. Remove the water pump and cover mounting bolts and nuts. Remove the water pump and cover as an assembly, then separate the two pieces.
87953070.gif Water pump and cover mounting—2.4L engine
Click to Enlarge
To install:
  1. Thoroughly clean and dry all mounting surfaces, bolts and bolt holes. Using a new gasket, install the water pump to the cover and tighten the bolts finger-tight.
  2. Lubricate the splines of the water pump with clean grease and install the assembly to the engine using new gaskets. Install the mounting bolts and nuts finger-tight.
  3. Lubricate the radiator outlet pipe O-ring with antifreeze and slide the pipe onto the water pump cover. Install the bolts finger-tight.
  4. With all gaps closed, tighten the bolts, in the following sequence, to the proper values:
    1. Pump assembly-to-chain housing nuts:19 ft. lbs. (26 Nm).
    2. Pump cover-to-pump assembly: 106 inch lbs. (12 Nm).
    3. Cover-to-block, bottom bolt first: 19 ft. lbs. (26 Nm).
    4. Radiator outlet pipe assembly-to-pump cover: 125 inch lbs. (14 Nm).
  5. Using new gaskets, install the exhaust manifold. Make sure to following the tightening sequence and torque specifications given in the exhaust manifold procedure located in this section.
  6. Raise and safely support the vehicle.
  7. Index the exhaust manifold bolts into the exhaust pipe flange.
  8. Connect the exhaust pipe to the manifold. Install the exhaust pipe flange bolts evenly and gradually to avoid binding. Turn the bolts in until fully seated.
  9. Connect the radiator outlet pipe to the transaxle and oil pan.
  10. Install the timing chain tensioner and front cover.
  11. Install the lower heat shield.
  12. Carefully lower the vehicle.
  13. Fasten the bolt that attaches the exhaust manifold brace to the manifold.
  14. Tighten the manifold-to-exhaust pipe nuts to specification.
  15. Install the upper heat shield.
  16. Attach the oxygen sensor connector.
  17. Fill the radiator with coolant until it comes out the heater hose outlet at the thermostat housing. Then connect the heater hose. Leave the radiator cap off.
  18. Connect the negative battery cable, then start the engine. Run the vehicle until the thermostat opens, fill the radiator and recovery tank to their proper levels, then turn the engine OFF.
  19. Once the vehicle has cooled, recheck the coolant level, then install the radiator cap.

3.1L Engine
  1. Disconnect the negative battery cable.
  2. Properly drain the cooling system into a suitable container.
  3. Loosen, but do not remove, the water pump pulley bolts.
  4. Remove the serpentine belt.
  5. Unfasten the water pump pulley bolts, then remove the pulley.
  6. Remove the five water pump mounting bolts, then remove the water pump.
To install:
86883115.gif View of the water pump mounting and bolt tightening specifications—3.1L engine shown
Click to Enlarge
  1. Clean all the gasket surfaces completely.
  2. Apply a thin bead of sealer around the outside edge of the water pump along the gasket sealing area, then install the gasket onto the water pump.
  3. Position the water pump on the engine, then tighten the water pump mounting bolts to 89 inch lbs. (10 Nm).
  4. Install the water pump pulley and finger-tighten the pulley bolts.
  5. Install the serpentine belt.
  6. Tighten the water pump pulley bolts to 18 ft. lbs. (25 Nm).
  7. Fill the cooling system.
  8. Connect the negative battery cable, then start the engine. Let the engine run until it reaches normal operating temperature, then check for leaks and coolant level. Add coolant, if necessary, then turn the engine OFF.

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