CB1100RS fuel tank rust

[pekingduck]

That is a negligible, harmless amount of normal corrosion.  In a hot climate, it may be better to keep the tank fuller rather than emptier because condensation in the air within the tank makes it more rust prone.  The tank was manufactured and a rust coating/treatment was applied, and using wire brushes or rough pads can remove it.

If the rust was really bad, the tank can be emptied and removed, and the fuel pump taken out to allow a pretty large opening, and you can easily put your hand inside.  There is a large, replaceable, though pricey, mesh filter attached to the fuel pump, that likely can be cleaned or blown clear, so actual harm from rust is quite unlikely.

Hi Pekingduck. Can the $380.00+ fuel filter  be cleaned, and reused?

Thanks.

It's a nylon mesh bag, easy to rinse out.  They're like many other Honda and likely other Japanese brands.  And yeah, vastly overpriced. You can find replacements on Amazon, $100 with the pump.