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Jamesmaca
31st March 2007, 18:23
Hey I have a 2000 DR400 that is leaking a little oil. It is leaking out of the small black half round things at the top of the head. Can anyone tell me what exactly these things do and why they are there. Is it a very big job to replace them???

Sensei
31st March 2007, 18:46
With out seeing a pic I would say it may be the Revcounter drive hole but post a Picture of area & will know for sure & what to do from there

Motu
31st March 2007, 18:49
''D'' seal,made when the cam bearings are bored.Use new genuine,and seal with OE grade silicon.