Question about 2003 Suzuki RM 125

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Oil leak by exhaust pipe

I have a 1975 Yamaha DT250 that I am fixing up and today after a ride I noticed oil on the head fins that looked like it came from the exhaust pipe, what could this be?

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  • royjmcc May 11, 2009

    Thanks guys for your info, let me clarify, my bike is a 2 cycle with an oil injector system and the oil seems to be coming out from where the pipe meets the head.

  • marcmx1 May 11, 2010

    was the leak coming from where the pipe joines the head or where it connects to the silencer

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I am not personally familiar with a 1975 DT250, but here is a general overview. If the bike is a 4 stroke, the oil you observed could have been from the exhaust, however it is more likely that it is from a leaky valve cover gasket or a head gasket. If the bike is a 2 stroke, the "oil" is from the exhaust (expansion chamber). It is excess 2 stroke oil that accumulates. You should reduce the mix to 32:1 or even 40:1 and replace the oring gasket in the opening of the pipe. If in a pinch you can use high temp silicone, but not a good way to go.
best wishes!

Posted on May 11, 2009

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Make sure you check to see if the exhaust pipe gasket is there. Without it, there will show an oil leak

Posted on Sep 09, 2010

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