[Darren69]

As for the reasons why they did it I don't know and its not exactly clear. My take is that as it was just after the TPG takeover and they were on a cost cutting exercise and may have had 750 parts spare with not so much demand for the 750ss or Monster, the 900 was the big seller after all. and as the Monster was far the best selling model they wanted to make as many options available for little development cost, hence the City and Dark models etc. plus other modes variations and the S was the flagship model so they wanted that to have the performance advantage over the other models. (S models had the big valve head) and had injection first.