Glad the 300 is sorted and 74 reliable bhp is superb. The nsr 150 barrells look a far better way of getting the capacity (apart from that strangely shaped restrictive looking exhaust 'header' easilly cured) than what has to be done to the standard rgv250 barrells and of course you have the 54mm stroke to start with so you don't end up massively oversquare. I'm using reed block spacers (to reduce crancase compresion) on the rs300 but have not got any back to back dyno results yet to prove that it works, food for thought though.