250cc/min, that's around 200bhp fuelling, cc/min / 5 x 4(cylinders) = 200.
Std cossie "yellows" will do this very comfortably and are a single nozzle design, best part is there are loads around as everybody upgrades so they're not worth a lot, they'll fuel to about 280 or so at 85%, the next "step" is dark greens, 0 280 150 803 these vary hugely I've had a set that was 80% duty at 300bhp, but have seen a set make a recorded 377bhp, I always have mine cleaned before use, so they are on the low side due to this.
tabetha