I have as some of you know had some new pipes (and other parts) fitted recently. Apart from a few differences in sound and riding etc., I have noticed that the choke / enricher knob now goes back in on its own. Before, I had to pull it out for starting, then push it back in as the engine warmed up. Now I pull it out and after a couple of minutes of warming up, it goes back in without my intervention. Is this what is supposed to happen? Is it supposed to be automatic? The tacho reads about 1000rpm on idle and it runs fine after only 2 minutes of warming the engine.