I know the pump is working fine , came directly from my FZR100 that runs great with it on and I can't see the 400 needing more fuel than the 1000.

I do think its the carbs but the bleeding little screws in the float bowls are as stuck as stuck can be ! and I dont fancy rounding the lil bleeders off, still, I suppose that it cant be any worse than they are now.

Anyway update on the pump mod, that works well pump runs till the float bowls are full then stops as it should then kicks back in hile the bikes running ! Job done on that one !