Question about 2000 Yamaha DT 125 R

1 Answer

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

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    One Above All:

    The expert with highest point at the last day of the past 12 weeks.

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.


    An expert that got 20 achievements.

  • Yamaha Master
  • 49,346 Answers

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.
dtr 125 water splashing out
Yamaha Motorcycle Parts Spares From Europes Number 1 MSP

Btw, I’m available to help over the phone in case u need at

Posted on Mar 13, 2016


6 Suggested Answers

  • 2 Answers

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

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

  • 7 Answers

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

  • 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,


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

  • 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

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Bad relay sensor in chev Montana van coolest system

If its ever been run without coolant or never had the coolant renewed then my guess is the rad is starting to block up. Its very difficult to effectively clean them, replacement is best. Run the engine until its warmed up, then switch off and feel the rad for even heat across the rad and gradually reduced heat top to bottom. If this doesn't give an answer you may need a good home mechanic / DIY to help you track it down. What ever you do don't run without a thermostat because the water will go around too fast to be cooled by the rad.

Sep 22, 2014 | Cars & Trucks

1 Answer

How to replace a radiator on a 2003 mitsubitshi lancer es

make sure the engine is cold , drain the coolant from the rad ,there will be a drain tap/bolt on the bottom of the rad ,be sure to us a container to collect the fluid as should'nt be left to run down a drain etc as is very toxic,disconnect the top and bottom hoses, there are usually two bolts either side of rad loosen these, rad may lift out if not remove the bolts and lift the rad away and out of vehicle , if the cooling fan is attached to the rad remove , will be obvious what bolts need undoing, replace this fan unit on new rad ,then refit new rad , reverse of removal , dont for get to check the drain plug is closed on the new rad , refill cooling system by adding coolant to the expansion tank, run the engine and bleed the air from system ,there will be bleed screws at various points around cooling hoses etc , allow engine to cool 1 hour min ,check coolant level top up and repeat bleeding process as neseccary good luck very straight forward job , keep me posted

May 11, 2014 | 1992 Lexus Es 300

1 Answer

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...

1) Your car should have a thermostat regardless of what your mechanic says. Fuel injected vehicles run better and more efficient at proper temperatures. So re-install thermostat properly before step 2.
2) Did the mechanic make sure the heater was on high temperature and blower on when he re-filled the cooling system?
Maybe not. So start engine when cool and rad cap off. Fill rad about an inch from the top and let the engine run up to normal operating temperature and keep an eye on coolant level in rad and keep it topped up as it's running. Rev the engine slightly for 5 seconds or so every once in a while to help with flow and pressure to make sure coolant is getting to and through heater core. Keep observing flow in rad to make sure it's good, when thermostat opens. You won't see much movement until thermostat opens at normal operating temperature, then you should see flow in rad and shortly after, rad fan should come on.Leave rad cap off and heater on until the rad fan comes on and off 3 or 4 times to make sure all air is out of the system. Then, make sure rad is topped up, put rad cap back on and fill return bottle to proper level. If that doesn't cure your overheating, then something was done wrong, or you have a possible head gasket problem but proper diagnosis should be done by a competent mechanic. What was the car doing initially to warrant these repairs, overheating?

Apr 08, 2012 | 1994 Dodge Intrepid

1 Answer

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...

lost pressure raise pressure up 2 bar and bleed the rads keep topping up untill all air has gone from rads do this with the pump off, turn all your rads back on and follow what in said .

Aug 27, 2011 | Heating & Cooling

1 Answer

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.

If the rads are upstairs and the boiler below it may be the pump is showing signs of giving up.
is the circuit balanced correctley?

Dec 18, 2010 | Water Heaters

1 Answer

Replaced radiator in 2001 chevy venture now no heat?

the most commen problem with no heat is an air lock in the cooling system
when the vehicle is cold remove the rad cap
then there is a air bleed screw on the coolant pipe that goes across the front valve cover open the bleed screw about 3/4 to a full turn
use a funnel and over fill the rad into the funnel (this will make a mess)
make sure you have a steady streem of coolant coming out of the bleeder when you have a steady streem close the bleeder then there is a bleeder screw on the thermostat hosing open it and when you have a steady streem from it close that one then put the rad cap back on
and start the vehicle put your heat controls on VENT ,HOT AND HIGH BLOWER SPEED
run the vehicle and make sure you have HOT AIR COMMING OUT OF THE VENTS NOT WARM if its just warm then shut the engine off and open the bleeder on the pipe not the T-STAT HOUSING
keep repeating till you get HOT AIR COMMING FROM THE VENTS
top up the over flow bottle the rad will be fine
hope this helps

Mar 23, 2010 | 2001 Chevrolet Venture

2 Answers

Put on water pump on 3.3 v6 how much trouble is it

Pretty straight forward, one of the easier ones nowadays. Drain rad etc, remove serpentine drive belt, remove water pump pulley, then pump. Most if not all bolts are fairly accessible. I usually add a little "vaseline" to "O" ring slot, to keep it in place a little better when installing new pump. Be real sure to bleed system good, with heater turned on when refilling system, if not through bleed screw, leave cap off long enough for engine to get up to operating temperature, and watch for thermostat to open and coolant circulate through rad 2 or 3 times before you put cap back on. By the way, if it's just a little weeping from pump, that's normal, just so your aware.

Dec 06, 2009 | 1997 Dodge Intrepid

1 Answer

Cant bleed the clutch tried everything

Does your truck have a slave cylinder? If it does you needto bleed it too

Apr 27, 2009 | Ford F-150 Cars & Trucks

1 Answer

No heat, replaced thermostat,water pump,heater core, all hose ok

When you put your hand on the inlet & outlet heater hoses are they both hot to the touch ? I mean 'ouch' hot, not just warm.
You might have an 'air lock' in the system if they are only warm, or temp feels quite different between them.
If possible, leave the return heater hose loose, start engine, let it warm up then bleed the system using return hose for a minute or so.
KEEP rad full while bleeding.
tighten hose, then watch the radiator fill hole for signs of air bubbles or frothing coming up thru antifreeze.
If either are present, you may have compression leak !
Another check for compression leak, is put rad cap on, drive around the block twice, let vehicle cool down then slowly remove rad cap & smell at filler hole as cap comes off.
compression leak will smell strong & burn eyes.. & we both know there is only one cure for that situation !!

Mar 02, 2009 | 1999 Chevrolet Silverado 1500

Not finding what you are looking for?
2000 Yamaha DT 125 R Logo

Related Topics:

40 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts


Level 2 Expert

314 Answers


Level 3 Expert

1216 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1165 Answers

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

Answer questions

Manuals & User Guides