Question about 2000 Yamaha DT 125 R

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I have a dtr125 on a 1990 im a mechanic by trade but never come across this problem before iv bleed the rad system but even after doin this it keeps presurising and water comes out of rad cap the bike has already had new gaskets and have checked the water for oil so know that ok just wondered if anyone else come across this problem before id be grateful for a reply

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  • Yamaha Master
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Hi, Stephen_mell you may have a faulty gasket in the radiator cap and the usual suspects are:
1. Low coolant level.
2. Restricted radiator air flow.
3. Faulty thermostat.
4. Coolant pump or fans inoperative.
5. Vent hose crimped.
6. Air in the coolant.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
https://yamahaclub.com/forums/topic/21295-overheating-dt125r-help-pls
dtr 125 water splashing out
http://www.motogelnar.cz/manual/YAMAHA/DT125X_RE-05-Service_Manual.pdf
Yamaha Motorcycle Parts Spares From Europes Number 1 MSP
http://www.dt125.cz/download/Owners_Manual-DT125X_RE.pdf

Posted on Mar 13, 2016

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Posted on Jan 02, 2017

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jrodder01r6
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SOURCE: repairs for a 2005 yamaha R6

go for it, just remember how you took everything apart and put it back together in the same order. just use a can or something to put your screws and bolts in. its not hard i do all the work on my 01 r6 and im no certified mechanic eather. if you need any assistance during the prosses, dont be afread to ask

Posted on Apr 27, 2009

voodoomox
  • 1689 Answers

SOURCE: I have a 2000 tw200 yamaha and Im not getting oil pressure up from the base.I took the oil filter out and started the bike and no oil out of there. There is oil in the bike.Don't know if its the oil p

hi gwfu,

tw's are great bike, just have to make sure it is on a tip top shape. you are correct, you may want to check on the pump because if there is no oil going to the filter, then the pump is at fault or the flow of oil from and to the pump may be blocked.

you may also want to check on your seals and gaskets as this may also cause pressure drops.

hope this helps.

best regards,

voodoo

Posted on Jun 02, 2009

  • 164 Answers

SOURCE: engine

if the water pump bearing or seal or bearing has colapsed it is posible for water to find its way into the crankcase. however I must ask did you completely flush the cooling system & change the oil when you changed the head gasket if not the sludge that was left behind would continue to mix with any fresh oil or coolant you may have put in if in fact your problem was a blown head gasket in wich case you need to investigate the cause of the blown gasket have you recently topped up the coolant whilst the motor was hot or worse over heated doing so will definately cause a head gasket to blow was there obvious evidence of the gasket being blown ie blow by marks on the gasket or the head & barrel surfaces if not you will need to further investigate the reason for water finding its way into the oil.Let me know how you get on.Regards Geoff

Posted on Apr 04, 2010

Testimonial: "thank i can now turn to other ways of solveing it "

  • 921 Answers

SOURCE: i have a 1999 r1 and the oil light keeps coming on

if oil level is o.k. then the sensor is probably bad.

Posted on May 06, 2010

sisadsl
  • 1508 Answers

SOURCE: Hey i have a dragstar 1100 A and the oil light

Dont drive it until you know the problem. Unless you are rally brave, if it really has no pressure it will destroy the engine

check or replace the oil pressure sender switch , and the relay( if it is the oil sender relay)

Posted on May 07, 2010

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I have a 1994 Dodge intrepid 3.3 engine Just have New Radiator, Water Pump and Therma stat placed in car. However the Car kept leaking Fluid out of The coolant tank. My mechanic fixed that by Pressurising...


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2) Did the mechanic make sure the heater was on high temperature and blower on when he re-filled the cooling system?
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I have a Vaillant Combi boiler, (not sure of make, but its 10 years old),the hot water works fine and the bolier heats up the downstairs rads fine, but the upstairs ones have all gone off...have bleed them...


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Its takeing a long time for some of radiators to get hot,and when they do they dont get that hot ,iv flushed the system out,could it be heating by-pass valve in the wrong position


hi there

start by turning off the rads that are geting hot,do the colder rads now get hot? try banging them gentle with a rubber mallet around the valves and across the rad.

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