Smoke hole on 04 250F

Feb 25, 2001
394
1
There is a small hole on the right side of the cr250F engine block....upon a cold morning warmup thismorning I saw smoke comming out of it and it didnt have a nice smell....kinda a dirty burning plastic type of smell. What is this hole for? Is this a exhaust overflow hole? I didnt keep the engine running after I saw this for fear of what that burning smell was.
 

High Lord Gomer

Poked with Sticks
Sep 26, 1999
11,789
34
On the CRF450 that is the drain hole for the splark plug hole. Since the spark plug site down in a recessed hole, it can collect water and it it supposed to drain out of that hole.
 

High Lord Gomer

Poked with Sticks
Sep 26, 1999
11,789
34
This is what I'm talking about:

 
 

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Feb 25, 2001
394
1
I must have gotten some junk down in there that is smoking with the heat of the engine...the bike hasent been washed recently so im just hoping its dirt.