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In 2019 I had bought a new kx450 to replace my 13 kx450 that I loved. Now I always have had the 2 stroke itch from never owning one, so i bought a buddies 2015 ktm250sx. That riding season I would try to ride both bikes back to back. It took me a while to get use to it compared to riding a 450 for so long. The bike was way more demanding than my 450, but it was a fun challenge. Certain tracks I liked the 250 and other were so bad that I would spin a few laps and just hop on my 450 lol. The 250 smoker tired me out just as much if not more than the 450 at times... which got me thinking about getting another 250f or 350 to replace the smoker. I just feel like im more of a 4 stroke guy because thats what ive mainly rode since i got into riding/racing. Now for all the same reasons other people have stated in the previous posts, I figured I would go the 250f route and picked up a 21 yz250f this past summer. Now i havent ridden or owned a 250f for almost 10 years. After the first few rides on the 250f, it was a lot like being on my 250 smoker. Between the 2 bikes, you are doing a lot more shifting, planning corners and pushing harder than you would on the 450. In a sense the 250f is more work than the 450, but doesnt have the torque, so now you start having to push it harder which makes you tired quicker. The acceleration torque of the 450 tires me out more than on the 250f. In the corners is where i can feel the difference in weight and inertia of the 2 bikes. Its not earth shattering, but you will notice it. Having the 250&250f has helped greatly increase my 450 corner speed and aggressiveness.
Each bike has its pluses and minuses for me at my weight and skill. If i go to an open practice where the dirt is tilled, i will ride the 450 first, until the track get some lines made because the 250f will struggle for me.
I thoroughly enjoy riding both bikes back to back as it helps progress my skillset and it opens my eye's to how complacent you get just riding my 450 24/7
Sorry for the rambling post
I ride a 2020 YZ450F, 2019 KX450f, YZ250, CRF270, and now the KTM 350 (long story....). The 350 is exactly what it should be. It has the maneuverability of the 250F with a shit ton of extra/ controllable pulling power. Easy to ride and the best of both worlds. I love my 450's and like the extra power. if you can ride a 450 correctly and controlled....there is nothing like it. 250F is great for the stadium style tracks. 350....best all around. They do take a bit to get used to. Fine tuning the gearing is huge in regards to getting the power where you want it. Good stuff by KTM. They found a niche and jumped on it. I'm stoked that i finally got one.....although i'm still keeping my 450's.
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My buddy has a Husky FC350. Man is it good. But at the same time I find it still has some of those 450 traits that make me think it wouldn’t be a better bike for me. I think if I could have both, that would be the best solution. But since I can only have one, the 250F makes the most sense for me.
I haven’t raced since I was a teenager on my CR125. I keep saying I’m gonna enter a +30 race sometime, but it hasn’t happened yet. I just enjoy the practice days.
I'm gonna go look at one of each this weekend.
... I have been a 450F guy since they hit the scene in ~ 2002. I came off a 2001 CR250R 2-stroke and was AMAZED how much faster I was on the 4-stroke right away. The calmer powerband and stability that the 4-stroke motor created in the chassis was very welcome in the Arizona open desert riding I was mostly doing at the time. I've loved 450s all along, agree they are tiring – especially on tight tracks/trails, but I still have 3 (2007 CRF450R, 2008 CRF450R, and a 2020 YZ450F), primarily because I love torque, short shifting, and low maintenance (I run them 100+ hours on top-ends). Great overall packages, soooo versatile, but weight is an issue, there’s no 2 ways about it.
On a whim, I purchased a 2016 YZ250F to see how far 250Fs had come since I had last ridden one in 2007 (purchased from VitalMX member SamCampbell – super dude). I was BLOWN AWAY. IT IS THE MOST FUN BIKE I HAVE EVER RIDDEN, but I want a tad more power ... so, guided by some excellent VitalMX advice from Walent215, Stone881, I am going big-bore. The total kit is a Cylinder Works 270 big-bore, DASA ported head, Ti valves + heavy-duty springs/keepers, Hot Cams Stage 1 cams (and Stage 2s to try as well), full Yosh Ti exhaust, TwinAir PowerFlow intake, Lightspeed velocity stack, swiss-cheesed airbox cover, Vortex ignition, and a Rekluse CORE EXP 3.0 autoclutch. It just needs assembly soon(ish). Will create a ride report once she's built up and broken in – some here may benefit.
I cannot overstate how much BETTER the handling is on my 250F in tight situations (e.g. the mountain trails I ride in Colorado now). Mind blowing better. Like “Why the heck would I ride anything else if a 250F is this much more fun?! I don’t care if I have to rebuild every 10 hours – it’ll be worth it!” I've described it as "mountain bike fun" to folks who ask. On "typical" MX tracks, that flickable feeling is less prevalent for me on the 250F - but it's still there and sweet. Cornering is better in general, but on 450s - to be able to squirt out of a corner at any time without setting it up perfectly and having more “jump making” margin is quite nice, too. Sooo … my hope is the modded 270F will be the perfect happy medium for me, retaining the all-important handling characteristics that make he 250F so dang fun. The mass of a 450F is also an advantage when blasting through certain terrain like sandy whoops, so the weight is not always a penalty. You need to keep that in mind.
450F vs. 250F ... go 250F, it's just more fun in more situations. I am a 40-something Vet B guy and safe fun = what it's all about for me. I can push a 250F harder which allows me to progress more quickly as a rider AND it's just more forgiving of mistakes (which I make many of). But, I still hang onto the 450Fs. GREAT bikes, too!
P.S. Putting a Rekluse clutch in a bike is truly magic. If you go with their Radius CX model, you can run it as a manual or autoclutch (just turn in the pressure-plate standoff ring so there's no pressure on it to go manual). The snappiness of the Rekluse manual clutch = awesome (gives the 250F more power to the ground) and the autoclutch dulls the snappiness of the 450F ever so slightly to make things more manageable, less intimidating. I actually have Rekluse autoclutches in all of my bikes because they take the fatigue that comes from trying not to stall a bike out of the equation --- GREAT for 450Fs, but nice on 250Fs, too. Here's another plug for using an autoclutch - engine stalls are less likely:
https://www.facebook.com/vurbmoto/videos/418089103166926/
P.P.S. I live in Denver Colorado at ~ 5280 feet of elevation. For every 1000 feet of elevation, naturally aspirated engines lose ~ 3% in power. This puts me at a 15% power loss right off-the-bat. Therefore, what I currently think is "a lot of power" on a 450F is much less than what most of you are fighting. Same for my 250F that I am modding. For most of you, a stock 250F with a nice intake and exhaust is perfect. That just occurred to me so I thought I would share. Lastly, I noticed that elevation did not make my 450F lighter ... so that is STILL a problem. :-) Without the snappier power to use to make the 450F "get out of its own way," I've noticed the 450F handling drawbacks are amplified. Kinda interesting, actually.
Long write up. Sorry about that.
Been riding a 250 2stroke and doing well against 450's, if I don't get a start I can usually dive inside and get them in the first corner...only downside for me are big jumps (took 10years off riding and im still not totally comfortable sending it) where you have to wind out second and powershift to third on the face but I make up for it in other sections...guys on 450's just roll up to it and grab a handful
Wanting to try a 4stroke again and Im torn on a new honda 250f or a husky or gasgas 350...If I didnt have to spend a bunch of $ on a KYB conversion I would probably go with the 350 but the new hondas looking pretty good and some of the 350 reviews in here have me second guessing
Im 170lbs and am used to carrying momentum so I think the 250f would be ok....only thing I worry about is the same problem I have with my 250 2stroke...when I'm battling with a couple guys and I have to follow someone into a rut and they are on a 450 I end up running up on their rear tire since I'm trying to carry speed and then they just grab a handful and Im clutching it trying to get going again...it's been awhile since Ive ridden a 250f..I did a few laps on a 2012 RMZ250 back when it was new and the only one I owned was back in 2005..an 04 crf 250 with a 302 stroker in it that was pretty fast..
The 350 was great! Power was perfect. Up two teeth in rear and FMF 4.1 system. 114 hours, not a single problem. Biggest flaw to the 350 was buying the 150 as a second bike. I spent a lot of time on the 150 practicing on skill and got to where It became my main bike.
Got the racing itch in March, sold the 150 to get a 450. Man, that took probably five hours to figure out. Couldn’t go off engine sound at first on jumps, would go long on everything. Didn’t like how unsettled it felt in corners, just an odd beast. Power everywhere. 15 hours or so later we get along pretty good, but can’t help but think I rode faster and smoother on my 350, and will likely being going back.
Btw... I also owned many modern 250 smokers and I would say my current 250 bb is similar in many ways to the smokers, just more controllable and planted because its got such linear power that pulls forever.
I now have a 22 YZ125 on order.
Like others have said vet racing is 80% fitness. If you can keep the pace after 4 laps you are good on any bike
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The YAM just handles so much better... more stable and turns better. Frankly, YAM should make a 300 FX. They would sell the heck out of them.
To me Yamaha's push through turns, whereas I can pretty much turn anywhere and as tight as I want on a KTM. I will say that I felt the opposite effect on my last Yz 250 smoker, it would constantly knife in turns.
With how much love there is for the YZ250f already, they'd take a huge bite out of KTMs sales, and seeing as they're the ones with the stones to keep Jap two strokes rolling out the factory, it's pretty crazy they haven't done that too.
Side note, 350 time for me, will see how this shakes out, may well joing the blu cru before long.
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