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Alright man, apparently I don't know what a stock 250F feels like. Got it. Also I didn't say it was from the corner, it wasn't. But it WAS 3rd gear.
If you are literally talking about a 50 foot jump and 3rd or 4th gear, your credibility is gone man. Sorry.
Dude can't read. 50 foot jump in 3rd or 4th gear is the ENTIRE reason this thread exists. I'm not out here bragging about how I hit this MASSIVE 50 foot jump, I'm asking why I can't hit the 50 foot jump. If you open your eyes you'd have read I brought a kx250f to the same track and hit it no issue in 3rd, then the same jump I can't even hit in 4th on my yz250f. This entire point of this thread is to ask for possible reasons for this. Again, I do not believe you hit the fly 150 on a stock 250f in 3rd gear, you're lying about that I do not care.
I'm out man. Good luck with your bike 🍻
What track? I want to see what this uphill Tripple looks like.
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This doesnt make sense. You're saying you're at like 9k rpm in 4th gear and can't clear a jump? Clearing a jump is a function of speed not power output. You clearly have more than enough speed.
Popping on deaccel sounds lean. Investigate your fuel pump/injectors.
LACR. It's not a hard triple to clear at all, and it's been there for like 8 years. Again, I've hit this triple probably a thousand times in my life and it's never been an issue until I get this new bike.
Does the rear wheel spin free on the stand? It would make sense if something was binding with the rear wheel or the brake is dragging or something along those lines.
I did check that at the track and it seems fine. I do like the idea of the clutch maybe slipping or the timing chain slipping. 2 things I will look into.
What is your air filter cleaning procedure? Maybe to much oil on the air filter after you cleaned it choking it out?
I have the K&N oil and cleaner. Throw the filter in a bucket of hot water and cleaner, use my hands to scrub it clean, ring it out and hang it up to dry in my garage. Morning it's dry, spray on the filter oil till there's a light layer of pink on the whole face. Not too much oil but definitely enough
Check your DEF fluid level. It sounds like it might be in limp mode.
You should do some roll on drag races side by side with someone on the KX or another Yamaha, same gear for both bikes not hitting a jump, switch bikes back and forth to account for weight variance and see what the real acceleration difference is.
Good idea, I'll try that
Not sure why so many downvotes on the dude, he clearly said he hit it on another bike (reasonably in 3rd gear). I like the drag race idea and get a feel from a few people on how the bike is accelerating on the same surface compared to other 250f bikes.
Thank you. I was starting to think I was insane or something, like I said 15 times it's 100% the bike and I'm here to ask for possible known issues.
Ride the kx
Vital dog-pile mentality by the serial hazers....
K&N oil is specifically marketed towards their pleated fabric filters. I’m not aware of how it behaves on foam filters but this does make me wonder.
Pit Row
One people don't read the whole post and two anytime you come on here with an issue with any brand of bike some brand fanboy is going to light you up and call you an idiot because they think you called their baby ugly.
All companies make a stinker once in a while even Yamaha.
Assuming the intake and exhaust are clear (no rags, bananas, etc hiding in there) that leaves you with poor compression, timing, spark, clutch slip, stuck brakes (this would feel like a shit ton of engine braking off throttle though), or fuel delivery as the issue. Definitely stick a flashlight down the muffler and the intake. There could be something jammed in there. That will screw up the air/fuel ratio in addition to choking down the engine. I assume the throttle plate is actually opening all the way and not jammed up?
After reading what I just wrote I don't know if timing could be bad enough to cause the problem and not be obvious. Probably the same for low compression assuming it starts and idles ok. Fuel delivery could be ok at idle and low loads and not be able to come up when you need full power. Checking fuel pressure might show something, but the catch is you might need to check it under load.
I think you are going to have to get the dealer involved though.
Last thing if that K&N uses oiled cotton I would not run it ever but it's your bike. It might be worth throwing the stock filter in just to see.
THANK YOU for the thought out response. I'll look into all of that. It's funny, when I first got the bike back home after buying it, I noticed the front brake rotor was definitely bent up, got a new one before riding. I use the twinair filter and the KN oil.
the 2023 yamaha 250f is way slower than the 2014 model
i rode a 22 (same bike) experienced A Rider...
And as soon as i got on it i immediately got off of it....
the YZ250F is getting worse each year that goes by....
The stock motor on both the 450 and 250F is trash from the jump....
Good luck with the new bike....
just for reference the 2006 -2009 crf250r packs more HP than the 23 Y250F
"I'm here to ask for possible known issues."
There is your problem right there.
Someone else posted above but the K&N oil is for cotton filters. I don't think it is causing your issue but think about switching to something made for foam filters. I like Maxima but most of the name brands are good and really pretty similar with the main differences being what it takes to clean them. Some of the "green" oils don't clean well without their specific cleaners.
Its not any of that air filter oil oilfilter air shit..... its that the engine is straight up trash in stock form....
recycled pop can aluminuim piston.... nicest part in that stock engine is the damn wrist pin for the piston.
if you dont know the setup for that engine and the ignition setup you pretty much have your hands on a rolling snail
I'd be a little suspect of the K&N oil as well. Possibly chocking the amount of air coming in? For what it's worth, grab a fresh new air filter some foam specific oil and give it a try.
also if the clutch still has the judder spring in it get that thing out immediately
Lets see some vids of you riding then we will find some answers...Last time I looked theres dudes making nattys on stock bikes...
& theres local pros who will blow our doors off on a 250f...
I actually have some limited experience with the k@n oil. My buddy just picked up a brand new bike and we were heading to a sand track that day. Filter was almost dry from the dealer and we didnt have any filter oil with us so we had to use the k&n oil from nearest auto parts store. It worked for that day no problems but that was the last time.
The newer yzf250 2nd 3rd and 4th are really close together compared to other 250fs.
I'm not saying the stock bike is slow? I'm saying my bike specifically is slow due to some sort of issue. I have like 1 video of me riding and it's 15 seconds long
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