I kinda get why people love 2 strokes but I think their supremacy is coming to an end, especially with bikes like the YZ250FX, for amateur riders like myself anyway. Pros are a different story, but that isn't my cup of tea, so its a mute point here.
I share your opinion that the light 2 strokes feel really light. That probably works fine on the track. But in the woods, where there is an infinite amount of ruts, roots, rocks and gremlins to throw you off course, I find that having some weight and gyroscope effect helps keep the bike planted and stable. I've ridden several 300s and 2 YZ250s and the best 2 bikes I have ever ridden for carving and technical singletrack are the Sherco 300 and the YZ250FX, because they are both planted and agile. My WR450F is just a bit heavy feeling to be in that group, but it is still a really good woods mount.
I ride with a guy on a YZ250. He is fast. I can keep up with him on my WR, but I'm working pretty hard. The thing is that 2 or 3x per ride he totally loses it on a wet slippery section. Our last ride started in snow. He sprained his wrist before we even got out of the staging area. The 300 guys don't seem to have this problem. More weight ? Tamer power delivery ? I don't know. But what I do know is I think that my YZ250FX is going to be very competitive with the 2 strokes in the conditions we ride in.
Our last ride group ride started with 8 guys. The YZ250 guy sprained his wrist. After 25 miles we came to a road that led back to the staging area or we could continue on for another 10 miles of singletrack. Of the 7 remaining guys, only 2 of us, me on my WR and a guy who still races on a 300 kept going to do the last 10 miles. What does that say ?
I can't wait to try a YZ450FX, because I think that is going to be a really good woods mount. Just the right amount of power with just enough agility. I think Yamaha is on to something with the mass centralization. I thought it was hype until I rode the YZ250FX and my WR back to back. Similar weights but a totally different feel an d not just because one is a 250 and the other is a 450.
As far as stalling, the best thing you can do for a WR450F is put in a YZ exhaust cam. It also lessens the engine braking which really helps in snotty conditions and keeping flow going through turns. The other thing is to run a 12 tooth sprocket to narrow up the gap between 1st, 2nd and 3rd. If you love 2nd and 3rd on the stock bike, you should try it with a 12 tooth on. 3rd rocks. It is tremendously useful in the woods.
I love that Yamaha is getting into the woods game. Did I mention that I can't wait to ride a YZ450FX ?
Edited by MidlifeCrisisGuy, November 09, 2015 - 07:57 AM.