found this on the internet recently. It concerns all models but I won`t be posting it in every forum as I know most of you are reading in every forum section and in the general sections this info would be lost.
Will add this to the downloads.
I`m sure there must be many service bulletins issued over the years but only dealers get them and about none appear online. At least I hardly saw any so far.
https://app.box.com/s/ccqi4o1hoelpn458dffawwf51kiq20cs

G.

Thank you for the link!

That was 2009
already revised to 69924492a

Aha !! Now I understand the probable reason for the gear selector spring on my ST4 breaking.

Thanks.