According to my dealers microfiche, and a desk bound rep @ Yamaha corp, this line was not clamped !
I logged a concern with Yamaha and they are looking further into this. My dealers service manager certainly thought this wasn't right, as do I.
Given the extreme temperature under the gas tank, the aging process of rubber, and high pressure fuel, i'm concerned someone will have a problem.
Given also that it feels like a plastic barbed fitting on each end, I'm not sure clamping down with a standard FI hose clamp is the answer either.
Thoughts anyone?