NMS seem to be oversizing theirs a little, more like 1700cc I think.

I think 400bhp is VERY VERY difficult on a 1600CVH and with the greatest of respect d4 rst, I don't think you're in a position to do it. You either need good access to tuning facilities or VERY VERY VERY deep pockets.

It just seems to be that as soon as someone cracks a certain power figure, the world and his wife think they can get further. All this talk of people wanting 350bhp/400bhp/170mph from their 1600CVH's at the moment, I'd like to see some PROPERLY proven 300bhp CVH's to be honest and some more people cracking 160mph, let alone 170mph or 180mph!!

350bhp and 170mph from 1600 (or thereaboouts) CC's is a VERY Elite club and you'll notice that the only RST's that are there, or even close to being there have VERY strong tuner links.