Posts: 9
Joined: 11/23/2018
Location: Saint Augustine, FL USA
I’m sure I’m just clueless on this but I just looked through my oil window on my KX250F and I saw a tan spot a a metal part; I’ve started the bike repeatedly and I’ve changed the oil and ridden and hasn’t gone away. Any help is greatly appreciated 
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Posts: 1485
Joined: 1/9/2010
Location: Riverside, CA USA
Posts: 5509
Joined: 1/31/2018
Location: Mansfield, OH USA
Posts: 538
Joined: 12/2/2015
Location: Yuba City, CA USA
Just looks like some marking from the factory. Could be part of a lot color code or something
Posts: 2022
Joined: 12/5/2013
Location: CT, USA
