Main Motorcycle: 2003 Triumph T100
Join Date: Nov 2005
Location: Waldheim, LA
Other Motorcycle: 2007 M-G Cali Vintage
Either are possible...and I've experienced both. The spigots on the engine side of the carbs are not very wide. If you are not careful when you reconnect, the clamp can actually slip off of the spigot and create an opening that will allow air within. Get a mirror and check completely around the connection...all it takes is a small misalignment. Also, Ive had problems with the stock clamps pinching the manifold rubbers and creating a leak. Lastly, its easy to unseat the diaphram when replacing the tops on your carburetors. If unseated (or torn), an air leak WILL occur.
2003 Bonneville T100 and 2007 Moto Guzzi California Vintage