identifying genuine Mikuni jets

FakeName

Member
Nov 6, 2018
21
0
32
37
I have the stock pipe on my blaster but I want to remove the airbox lid/snorkel.

I stopped by the local Yamaha dealer to pick up a few main jets...I bought a 240/250/260. The guy at the parts counter assured me these are genuine Mikuni jets, but I’m concerned that there are no Mikuni markings. The jets are stamped “AB240, 250RB, and 260RB”.

Should real Mikuni jets have logos, or are these genuine jets?
Thanks