My car is a 2002 SV U.S. spec Zetec. It has some characteristics that make me think it has a lightened flywheel. It revs up very quickly, but spools down even quicker. It idles at 1400 RPM, but will die every time at stoplights unless you really work to keep the revs up. The car has 38,000 original miles and has always behaved like this. The engine itself runs great, and I am used to it trying to die at stop signs. I am just curious because I have heard that Caterham uses a lighter flywheel than the standard Ford unit.