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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Oil leaking from somewhere only after its been ridden (hot)
Post Info TOPIC: Oil leaking from somewhere only after its been ridden (hot)
yamahaTT250R


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Oil leaking from somewhere only after its been ridden (hot)
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Hey guys i have had my australian 2000 mod TTR since early 2009 and there has been no problems yet (good) but 3 days ago i noticed some oil started dripping after i had come back after a ride and cannot find where it is coming from i cleaned all the oil off it and the next day after i rode home i noticed it again, any ideas? Should i remove the whole motor and see if its something like a gasket because it seems to be coming from the Right hand side of the transmission area.

Thanks

Adam

 



-- Edited by yamahaTT250R on Friday 11th of November 2011 01:29:27 AM

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TTRfan


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The most common cause of oil leaks on the TTR is a failed "decompressor" plug - situated just above the exhaust. When this one leaks badly then, on a run, the oil can get blown all over the front of the engine and just possibly could be dripping down the RHS. Although a tad unlikely, it is worth checking as it is an easy fix. See http://www.ttr250.com/Replacing_cylinder_head_oil_plug/TTR_oil_plug.htm

The only other things I can think of are:

a) the cam cover leaking. Unusual, especially if it hasn't been disturbed and

b) the transmission oil seal behind the front sprocket - again that's unusual but not unheard of. If the leak occurs only after a run and not when standing then thsi might be the one. Easy enough to replace. Access after removing the sprocket.

Best give the engine a real good clean, take it for a run and see if that helps identify any fresh oil escaping!

Brian



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yamahaTT250R


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Thanks Brian i will give your methods a try, it is not the decompressor plug as i have checked there already, however behind the sprocket seems fine and a close up examination has revealed to me a gasket which has been torn a little on the rear RH engine side where the casings connect.

thanks again

Adam



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TTRfan


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Odd that it has split. Build up of pressure in the crankcase for some reason? Best check breather is not kinked and is clear.

You need cover gasket 4GY-15461-00-00

Good luck!

Brian



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yamahaTT250R


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hey buddy would the breather hose be the one coming from the head leading down towards the left rear side of the bike?

thanks



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TTRfan


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yamahaTT250R wrote:

hey buddy would the breather hose be the one coming from the head leading down towards the left rear side of the bike?

thanks

That's the one! 



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