Swapped out the headlight bulbs. Turns out one of them as already a 55w osram... seems a bit brighter but will have to take it out at night to see if its made any difference.
Failing that ill clean the inside of the casing. If no change ill get some 100w bulbs, which for some reason are cheaper than the 55w ones i bought
Be careful you don't end up melting your wiring, that's a big increase in power draw.