Honda CBR250R Why the hole?

[edwinchester]

Hi, took the plastic off this morning with a view to giving the trusty Honda a much needed clean and noticed a tiny amount of oil in the belly pan.

On closer inspection it seems to have come from a very small hole in the engine casing just to the rear and below the oil filter casing.

I'm assuming it's some kind of breather but as no hose is attached was wondering and it is a very small hole, about 5mm.

Does anyone actually know what it is for sure?

Thanks for reading.

Edited July 29, 2017 by edwinchester

[VocalNeal]

You might get better luck on "Thumpertalk"

[Happy Grumpy]

The breather tube has been pulled out. That's where it's connected. 

[Neilly]

23 hours ago, edwinchester said:

Does anyone actually know what it is for sure?

The leak is from the water pump shaft seal, the weep hole is for both coolant and oil (meaning it can leak either, oil or coolant depending on which seal is leaking)...have a read of this thread on TT

 

https://thumpertalk.com/forums/topic/1224628-infamous-oil-leak-from-coolant-weep-hole/

[edwinchester]

Thanks very much for the replies and especially Neilly for the link which describes the problem and solution exactly.