Thank you for your warm welcome guys, and for the tracks that you have given me, I can see that everything can be normal but also the opposite with significant risks. I have to check it.
I would like to know if the oil non-return valve has been changed (discretely) by Triumph
Albertaduke, Thanks for the french words
and for the american, Australian , English guys : my apologies for my approximativ english.
Albertaduke, thanks for the information about Kilderouge (I will take contact with him, I've already read some subjects from him on rocket-3.org web site.
About the bathroom subject, Honestly, I do not know at all how the French girls play with faucets bidets or other utensils in the bathroom. I should make an inquiry on the matter.
Canberra, Interesting answer, I agree with you, and thanks for your contribution , effectively, I intended to drain the oil tank only to see what it contains. If the tank is not completely empty, I wonder how much can be considered sufficient to start I suppose that 50 cl should be enough (?)
(My Rocket has not been driven for a few weeks now) I will see if the oil tank is partially or completely empty. If it's not empty, I will have to do this check several time to be sure.
In another hand, why the oil would empty only partially? can be about of pressure when the engine is still hot (?)
I will find the answers et I'll be back,
thanks to you all Rocket Men !!