Hi all, I am buidling a scramber project based on a BMW F650 Funduro and I have bought a Honda CB250RS tank which is the best shaped piece. However I am struggling to figure out where the fuel breather on the CB250RS tank is. Below the tank I see only the fuel tap and the fuel cap seems well sealed. Someone has any clue where the fuel breather (venting valve) is and could post some pics? Thanks and merry xmas.
Many years ago i did an almost equally odd thing and built a roadracer out of a Gilera Nordwest...Using a CB250RS tank also. It dropped straight on... From memory they breathe through the cap - and well enough that I had no fuel supply problems on the big single.
It's in the cap. There should be 2 little holes in the lower end of the cap (inside) and you should see one in the steel part under the black top, just outside the rubber seal for the atmospheric side.
Hi Maurizio, it's definitely in the fuel cap as others have advised. Here's some pics of one of my CB250RS fuel caps. You can clearly see the holes in the bottom , despite some surface rust.
