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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 21:18 - 27 May 2006 Post subject: dtr 125 water splashing out |
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the bike is 1994 yamaha dtr 125.ok about a week or so ago i skimmed the barrel and head and fitted a new head gasket since doing this i have been on the bike 2 times for about 4 -5 hours each time and now as soon as you hit powerband the coolent just splashes out of the back of the bike near the expansion tank or it is coming out of the expansion tank one of them anyway if you dont let the bike hit powerband it is fine and nothing comes out does anyone know what could cause this as it is really annoying me know cause while owning the bike the cooling system has never worked properly it has always done this or overheated any help will be much appreciated thanks ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years
Last edited by lee125 on 21:23 - 27 May 2006; edited 1 time in total |
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shager |
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shager Scooby Slapper
Joined: 04 Jan 2006 Karma :
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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 21:29 - 27 May 2006 Post subject: |
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also the power valve has been fully opened so your going along then it kicks in all of a sudden and then you are off. ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years |
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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 22:44 - 27 May 2006 Post subject: |
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any ideas? please i really need to fix it ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years |
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Finglonga |
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Finglonga World Chat Champion
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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 00:08 - 28 May 2006 Post subject: |
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i thought it might build up more pressure in the cooling system as it only does it when in powereband ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years |
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sickpup |
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sickpup Old Timer
Joined: 21 Apr 2004 Karma :
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lee125 |
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lee125 World Chat Champion
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Robby |
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Robby Dirty Old Man
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lee125 |
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lee125 World Chat Champion
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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 14:13 - 28 May 2006 Post subject: |
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also i have taken the head of yesterday and the gasket doesnt have a hole or anything in it so it hasnt blown. ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years |
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Robby |
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Robby Dirty Old Man
Joined: 16 May 2002 Karma :
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Posted: 14:26 - 28 May 2006 Post subject: |
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It doesn't have to have a hole - but I would at least expect a scorch mark or some discolouring where the gases have leaked into the water jacket.
You shouldn't even consider do a job like this without a torque wrench. They aren't very expensive, you should get one.
Any other modifications to the bike like a big bore kit?
In your shoes I would be rebuilding the engine again, using new gaskets and being sure the head and barrell are perfectly flat. Then when you fill the cooling system make sure you fill it, let the bike warm up on tick over with the radiator cap off so that the thermostat opens, top up the rad as necessary, then switch off, let it cool down, check the level again, and put the rad cap on.
Also worth getting a new cap, just in case thats part of the problem.
If its still pressurising the cooling system after all that, I'm short on ideas. Maybe the barrel gone porous, but thats unlikely. |
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lee125 |
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lee125 World Chat Champion
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Robby |
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Robby Dirty Old Man
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lee125 |
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lee125 World Chat Champion
Joined: 18 Dec 2005 Karma :
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Posted: 15:39 - 28 May 2006 Post subject: |
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ok will do thanks for the help ____________________ cbt passed 01/07/2006 bike:92 dt 125 and 96 honda cr 250
theory:PASSED! A2 test:PASSED 08/11/2006 restricted to 33bhp for 2 years |
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Old Thread Alert!
The last post was made 17 years, 337 days ago. Instead of replying here, would creating a new thread be more useful? |
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