hi grumpy,i did the fuel flow test & it took about 3 mins to fill the cup but this is with the fuel line pointing down.from the tank the fuel line runs down to the tap then down to the filter & wraps under the head & then up to the carby.the filter is on the right way, i have checked this but will be replacing it with a new one.

in regards to the fuel cap, i don`t think it`s the correct one for the tank.it doesn`t fit properly,has no vent but someone has put a hole through it previously,it has BP embossed on the top of it.