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Hi all. Cant get over the finish line with my 750F2. Am struggling to get the carbs to stop leaking petrol. Short history: they were totally stripped and the gummed up bits soaked overnight in carb cleaner, they were then cleaned using guitar strings and compressed air, they were then ultrasonic cleaned and the outers vapour blasted, they were rebuilt with new float valves and gaskets/o-rings. They were bench tested for leaks and a crack with the mallet settled everything (no leaks), fitted them to the bike and gave the engine a run (no leaks), fitted the tank and went for a short ride around the block (no leaks), fixed a couple of non carb related small issues then helmet on for a longer run. Turned on the petrol and a leak from No.2, went for a short run in the hope it would settle (it didn't).Stripped the carbs yet again and found all the float heights were perfect. So replaced the float valves again with Keyster items from DSS. When tested they leaked from 2 &4 and would not settle. Stripped again and set floats a bit higher to try to shut the valves a bit sooner. Now leaking on 1 2 & 4. Am I missing something here as I'm starting to get desperate with this. Everything is spotlessly clean, the floats move freely, the float heights are right, the valves are on the third new set. I now have no idea where to go with this as I just don't know what's wrong with them and therefore how to fix it.Could anybody who has knowledge of these things and lives anywhere near Thornton-Cleveleys Lancs call round and give me some pointers please. Or failing that, does anybody know a carb expert that I could send them to.HELP!!! Yours sincerely, Desperate of Lancashire.