Hi there, I have a issue with my carb drying out after a few high revs, seems the crappy petcock is not working, carbs is dry, tank is full and changed spark plug, just cuts out when in idle then does not want to start. Done a bypass of the vacuum petcock and it works as normal, got a temp clamp on the fuel pipe when it's not infuse until I resolve it. Just wanted to know if anyone has tried a 12v fuel tap/stop on theirs (gravity forced fuel), seems like a good idea wiring one to the starter, so when the key switches electrics on the fuel switch opens electrically and shuts off when the key turns the electric off. I cannot see anywhere on the web anyone who's converted one tho so I'm thinking there must be a reason? I personally cannot see any problems with the idea. Any help and input on the subject would be excellent. I have one ready to buy like this: http://cdn2.bigcommerce.com/server5500/0baae/products/485/images/2212/Tomasetto_Petrol_Shut_off_valve__22358.1449320652.1280.1280.jpg" onclick="window.open(this.href);return false; I just want rid of the stupid vacuum tap, and don't think uneasy to manually switch it off and on at every trip. Thanks guys and gals