Black gunk from a 2 stroke motorbike engine exhaust?

473313692 7e9fa1776f m Black gunk from a 2 stroke motorbike engine exhaust?
by David Jackmanson

Question by alex p: Black gunk from a 2 stroke motorbike engine exhaust?
Ive got a 2 stroke racing motorbike, but recently ive noticed some black goo dripping from my exhaust. Only a little bit mind you, but was wondering why. I understand the petrol oil mix is gonna make a lot of smoke, but blank gunk?

Best answer:

Answer by Zac V
probably just build up from the exaust.

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