Flailbasher Posted June 8, 2016 Share Posted June 8, 2016 Hi there, This is my first post so go easy please! I'm restoring a 1974 series 3. I have some questions about the carburettor: 1. In the first photo, is my holding the end of the "smith and sons" vacuum thing. What is it and what does it connect to?? I've started and run the engine, and if I don't put my finger over the hole which is sucking in air then it judders. As soon as I put my finger over the hole it's fine.. 2. In the second photo it shows where the pipe in the right of the first photo connects to the oil filler pipe.. Could someone tell me what that connects to as it doesn't seem to fit in the "vacuum" thing in the first photo... Thanks for any help in advance! Tom Quote Link to comment Share on other sites More sharing options...
Jon White Posted June 14, 2016 Share Posted June 14, 2016 The two connect together with a short length of hose. This is part of the crankcase ventilation system. Quote Link to comment Share on other sites More sharing options...
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