Mystery oil seal

[jic44]

Hi lads, stripping the engine this evening I had removed the water pump and the clutch and generator cover and than noticed an oil seal on the bench that i hadn't removed so it must have fallen from somewhere and I cant find a home for it, its definatly from the engine as i cleaned down the bench completly before starting work. its got a 16mm internal diameter and a 30mm outside diameter (approx) and the number AE0382A stamped on it. Any idea on where its from?
I tried to upload a picture of it but it keeps coming back saying the file is too big.
cheers lads

[cargo]

gear change shaft by the sound of it

[jic44]

thats what i thought but that one is still in place and its too big anyway! baffeled. Ive had zxr engines apart a together about ten times now and dont remember ever seeing one like this before!!

[cargo]

There are only two seals gear change shaft and output shaft ( front sprocket)

theres an o ring on the water pump and an internal seal but it cant fall out

could it be one of the seals from the spark plug holes or even the top cover bolt seals

[jic44]

could be mystery solved.. i had the water pump open so could it have fallen out then... defo none of the above mentioned, its the same as the selector seal but a bigger outside diameter. ill check it out tomorrow!!

[jic44]

Mystery solved... Water pump seal, cheers cargo