I broke my fast flow fuel tap last night and had to replace it with old original one. Filter part (mesh inside the tank) was in so poor condition that I decided to take it completely away before IT clogs my carb. As the overall quality of the original part seems better than the fast-flow tap's I'm thinking about fixing it and making it better flowing.
With what material and how should I replace the mesh?
Is it possible to drill the tap to make it flow better and how this is done?
Thanks.
Original fuel tap (filter & making it flow better)
I have the original tap fitted on my series 2 TV 175 nearly 40 years old... But its now fueling the dellorto 32 fed TS1 225...
The holes in the tap have been slightly enlarged, but they can only be opened a small amount as the rubber internal gasket becomes damaged as the rubber that fits around the three protruding bits of metal that need drilling locates on these... but the piece that turns to link these holes that flow fuel has had the inter connecting slot ground deeper to allow more fuel to flow... all the mods on mine have been made at the mechanism that switches the fuel on and to reserve, as this is where my standard fuel tap "I thought" was the most restrictive... this part of the tap unscrews and has a spring that presses the rubber gasket up against a round piece of metal linking it to the now drilled holes that supply fuel, which is connected to and turns with the fuel tap lever.... Other than this the tap is as was... This will make more sense if you have a tap infront of you, and then take it apart....
... as the first time I dissasembled one, I could see at a glance how it worked... 
The holes in the tap have been slightly enlarged, but they can only be opened a small amount as the rubber internal gasket becomes damaged as the rubber that fits around the three protruding bits of metal that need drilling locates on these... but the piece that turns to link these holes that flow fuel has had the inter connecting slot ground deeper to allow more fuel to flow... all the mods on mine have been made at the mechanism that switches the fuel on and to reserve, as this is where my standard fuel tap "I thought" was the most restrictive... this part of the tap unscrews and has a spring that presses the rubber gasket up against a round piece of metal linking it to the now drilled holes that supply fuel, which is connected to and turns with the fuel tap lever.... Other than this the tap is as was... This will make more sense if you have a tap infront of you, and then take it apart....
... as the first time I dissasembled one, I could see at a glance how it worked...