power valve over flow hose /black oil?

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Nov 14, 2003
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#1
Hi guys
03 yz 125 i have black oily substance dripping out of over flow hose from power valve i think is this normal or is jetting wrong , also i do get smoke coming out of it sometimes as well is this normal.
Any advice would be great
Cheers
 

marcusgunby

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Jan 9, 2000
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#2
It is normal to get a small amount of goo and smoke out of that pipe as it is a vent for the pc, however if its excessive you need to jet it leaner.See www.eric-gorr.com for the jetitng guide.