I have a long history of big bore 2-strokes in my past followed by a pair of 650 4-strokes, all of which were purely for off road use trails/desert. Back in the day the combination of power and light weight on the 500 2-strokes was unbeatable, but now I love the spread of 4-stroke power. Current bike is an '08WR450 and it's a great bike and a step in the right direction from the XR650R that I recently had. The power is solid and even in the desert it is not really lacking. The biggest plus has been the drop in weight and the result in improved handling. With that said, it makes me wonder how much a further drop in weight (approx 30 lbs) and slight increase in power would be in swapping from a WR to a YZ. Absolute top speed and loss of e-start would not be an issue as I don't often top out in 5th and the WR is criminally easy to kick over (and virtually required on cold starts anyway). The downside for me would be the loss of the charging system for night riding, but I would just swap over to Li battery packs and call it good. Although the YZ suspension would likely be a bit more harsh off road, from what I have heard it is the best out there and probably would work well with a revalve. The YZ also seems to be the most stable of the MX bikes. Any thoughts on this from anyone that may have made the swap either from WR to YZ or the other way around?