Me too. I'll post up a video shortly. I'm charging my GoPro as I speak.
I beg to differ on a number of points.
1) The areas I ride are littered with orange 4 stroke bikes, usually broken or needing maintenance ! If those orange bikes are the right mount for this terrain, so is my lightened WR450F.
2) My WR450F is beginning to rock the tight single track. It has excellent, controllable power at all engine speeds, the chassis is about as good as it gets, etc. Its only real shortcoming is weight and I have shown that one can make a significant dent in that issue fairly easily.
3) We had this exact discussion on the trail a few days ago. The gist is that the WR450F is the perfect bike for a guy of my size and strength. I've ridden my friends bored and stroked YZ250F (its now a 310.) I'll take my WR450F over it any day. If a 250 is the perfect bike for a 160 pound guy, and many say it is, the 450F is the right bike for me.
If your 250 is 30 pounds less than a WR450F, then my WR450F is only 8 pounds heavier than it. Remember the WR450F uses the YZ250F chassis, so you can guess at how its starting to handle. The next time you ride your 250, imagine it had 450 power in it. Don't need 450 power in the woods ? I agree not the top end power, but the torque and throttle response is outstanding. Lifting the front wheel is never an issue and I bet I'm shifting gears half as often as you are.
My riding ability is improving rapidly and every week I get my WR tweaked a little better. I may not be a pro, but its getting damn fun... which is the purpose of this endeavor, after all. I just love twisting the throttle racing from tree to tree.
I think it's cool what you've done with your bike, but you must realize it's not for everyone. Part of the reason I bought a WR is because I *want* an e-start bike. And I've found that people's idea of what constitutes 'tight single track' varies wildly. I've seen videos of 'tight single track' I could ride a Gold Wing down no problem. If you can't picture a situation where stalling your bike and having to kick it is a big problem, then clearly we're not riding the same terrain.
1) The areas where I ride are also littered with orange bikes, 2 and 4 strokes. But I can't say that I see them broken or 'needing maintenance'. They're out on the trails being ridden. Let's not turn this into brand bashing, ok? I'll just say if I had to bet on which of my bikes would last the longest with the least amount of maintenance, my money would be on my WR. But I do regular maintenance, so I'm not too worried about it.
2) You say 'easily', I say with great sacrifice. And one that I (and I'll bet most WR owners) would be unwilling to make.
3) Personally, I don't buy into the whole 'this CC of bike is perfect for this weight of rider, while this one is not' concept. That might apply if you're talking about competitive racing like MX/SX where a 250 lbs guy racing a 250F against 140 lbs guys is going to be at a disadvantage, but for the average Joe trail rider, it's BS. My previous bike was CRF250X and I never weighed less than 220 lbs the entire time I owned it. And yet it never failed to pull me up any hill or around any trail. It certainly wasn't 'powerful' like my WR, but it wasn't 'underpowered' either. Maybe if all I did was climb huge hills at high elevation or ride deep sand, I might think differently. But I don't, and a 250F is plenty enough power, and my KTM has way more power than my old 250X did.
What you seem to be forgetting is reciprocating mass of the engine. Even if your 450 and my 250 weighed the exact same on paper, my 250 would still feel lighter everywhere when actually riding them. Just look at the KTM 250 and 350. They are virtually the same bike except the displacement. Yet every test/review where they've ridden both bikes back to back say the exact same thing: the 350 is more torquey and more power, but feels heavier than the 250 everywhere. Just like the 350 feels way lighter than a 450, even though it's only 11 lbs difference.
And no, I really don't need 450 power in the woods. Been there and done that for the last year and a half. Riding the 450 in tight woods quickly becomes an exercise in throttle/clutch control and managing that power. My KTM can wheelie off the throttle alone sitting in 3rd gear, no clutch. I have zero problem lofting the front over anything. It's not just a simple crack of the throttle like the WR, it takes a little more technique (aka skill) but easily does it.
No way I'm shifting twice as much either. It's a wide-ratio 250F, not a 125 smoker. I'm in 2nd or 3rd gear most of the time on my 250. I'm in 2nd or 3rd gear most of the time of my 450 as well. The only real difference is I rev my 250 out more, where I just short-shift the 450. But the total amount of shifting isn't all that much different.
So again, I do appreciate what you've done with your bike. There was a time I even pondered doing the same with mine, adding a rekluse to make the kick start only much less of an issue. But one swap with a buddy who has a WR250 and I knew I needed to be on a 250 again. It's just far easier to ride faster with much less energy expended in the process.
I have a dual-sport kit on order for my WR, should be here any day now. I think it will make an excellent dual sport bike. But for a dedicated trail bike on the terrain I ride, I have no doubt my 250 is a better choice for me, and I'm faster on it with less effort. YMMV