DT125R Mysterious Leak...

[firmware05]

Hi all..
Since I have topped up my radiator on my Yamaha DT125R I have found theres liquid coming out of the frame as shown in attatched pictures... its not oil.. has anyone any idea what it could be?

[Timmeh]

leaky / over-full expansion tank?
____________________
GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
20:22:30 BLUEX5: i would love to be forced to undergo a**l plugging with different sizes
20:48:18 Temeluchus: comp you hunk of smouldering homos3x you

[Philious]

Im no expert but, smell it check if its petrol, it could be coming from carb overflow if it is.

Its not nothing silly like chain lube?
____________________
Previously; Honda XR125 - Yamaha DT125r - Aprilia Rs125 - Suzuki GS500e, Currently; Kawasaki ZX6R + ZX10R
Theory : Passed 28/7/09 Module 1: Passed 21/09/09 Module 2: Passed 23/09/09

[firmware05]

No its not petrol and its not oil and my expansion tank is at the required level... i did at some point think it was the expansion tank as it runs through the frame.. theres a cut away in the frame where the arrow points in the picture.. this is a mystery

[2t-Screamer]

if its coolant you would be able to smell it, maybe its from the battery breather pipe?
____________________
visit Collective Knowledge

[firmware05]

Well im gonna check again tomorrow and post some more pics.. Theres a small hole in the frame and thats where its coming from. It runs down the stand as shown in the pics. If i use the bike on a short journey it seems to be ok.. long journeys seem to make it happen. I have checked the bike all over for leaks and thats the only one. I did fill the radiator to the very top last week with water and was told i should have mixed it with anti-freeze. Will check my radiator level tomorrow.

[Willenium]

Head gasket leaking. Pressure from the cylinder leaking into the cooling system pressurises the expansion tank and forces the excess coolant out of the frame. Mine did this after lots of modding so I flogged it.