Hi the start judder is a common problem it's the start clutch , I changed the oil drove 500 miles and changed it again this fixed it but not for long , so I was told by a honda tech what they do is change the oil then do a clutch burn , car in gear brakes hard on and rev to 1500 for a second then do it again after second burn change oil again , I have never tried it and honda charge about £500 , but it will come back ,if you want the oil e bay is the cheapest for the genuine honda cvt oil , a start clutch kit is about £1600 then you need to get it fitted , my jazz had 110k on it but judder is not as bad as my wife's which only has 60k