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Could I be burning oil?

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Could the black residue left on the rear fender be from burning oil or is it just from carbon in the exhaust that is more noticeable because its on white?

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 If its due to burning oil a low oil level on the stick would probably be a better indicator. Also if the bike is running to rich it could cause the black sooty mess your seeing. 

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Its never really low on oil so thats kinda what my guess was. Just wanted to make sure. Thanks for the confirmation.

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how easy does it clean off.  When i have noticed burned oil, its a little difficult to clean off and smears a bit.  Not a lot, but a little.  If its from running rich, then it will generally wipe off fairly easy.

 

How many hours are on the top end.  Once the rings start to wear you will get a little blow by..  That amount can barely be noticeable on the dipstick.  However, with time, you will see it a little more and the bike will begin to lose power.

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from your pic,   it's nothing and normal.   Put some clear packing tape or alum tape over the spot if you don't want it to accumulate

 

Crf's normally use a little oil for various reasons, normal,

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