i will be running the r1 in tank fuel pump so the feed and return pipes will go straight into those but all the tanks i have seen have got the feed and return outlets already welded in what do you do with these just link them or is there another tank i should look for

could you not just bung them up or have the ends welded over? easiest would be to use a short piece of rubber pipe with a bung in it.

i made my own tank and got an ally boss for the pump to fit to, just got a breather pipe and a filler pipe hole now
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would like to make my own but aint to confident with me welder yet