Thank you guys !
It's really a very good bass guitar, one of the best I had, I don't separate from this bass if I had not many other basses, especially one Noguera I just had and it took 10 months to produce it.
This Yamaha has an exceptional playing comfort, the sound is rich and extremely well-defined, the B string is very precise, the harmonics sound really good, the woods are beautiful, it's a true high level bass !