idea measure your belt when you open the variator my first belt was 1010 mm. and at WOT. it would rev to 8500 rpm. with new belt at 1004 mm/25.2 mm, it lowered rpm. a lot, my 3rd. belt also is 1004 mm. / 25.2 mm. 30 degrees,. that is the mitsuboshi measurement for 300i downtown,. and they measure around the belt with a soft tape, ( tailors tape ) cross ref. against a steel tape for exact measure,.