Hi all, ongoing problem which some of you will have already read about previously (However i've been in and out of hospital for a bit and still not managed to fix it.
The Preamble
Was doing some modifications on the bike - the most important of these being tank re-shaping (basically cutting out the existing cap and replacing it).
Since that point bike began to exhibit symptoms of fuel starvation : rolling on the throttle swiftly caused a pop and the bike acted like it was starved. If i was very very gentle with the throttle it would be fine.
we originally thought the tank wasn't vented enough :
- ran with the cap open (no difference to performance)
- bored bigger vent in cap (no difference in performance)
- checked filters (no blockages)
- eventually hooked it up to an air flow tester and it _does_ have enough venting.
Since then it has been with a mechanic friend who has done the following to it (before i demanded it back off him because he's had it for about 6 months now).
- Carbs disassembled, cleaned and reassembled (there was some grit but thats sorted)
- Serviced most of the important areas (he's a triumph mechanic).
- Sorted the front brakes because it had been standing for a while and they were locked.
Still no improvement in the breathing problem.
(i should state at this point that prior to the tank it didn't have _that_ many miles on it and was in good condition).
Any ideas? I'm pretty much at my wits end with the bike now and if all else fails will just sell it on the cheap to someone technically minded and buy a 'working' bike.

i'm hopeful that you guys might have any helpful suggestions that might give me a pointer - the mechanic has suggested putting performance coils on it but i'm holding back because it feels like it's 'guessing' at this stage (and it's not _that_ old a bike.)
hoping some wiser heads out there might have some ideas.
All the best,
Ant