Most bullet proof fuel injected 250?

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7/15/2021 8:28 AM

Which fuel injected 250 from years past or current, is notorious for having a bullet proof motor after many hours?

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7/15/2021 8:30 AM
Edited Date/Time: 7/15/2021 8:31 AM

2014+ yamaha YZ250F. 2010-2013 Honda CRF250. The Honda motor was pretty slow and i don't think it punished the motor as bad as some of the other bikes that were more on the edge.

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7/15/2021 8:35 AM

Moto520 wrote:

2014+ yamaha YZ250F. 2010-2013 Honda CRF250. The Honda motor was pretty slow and i don't think it punished the motor as bad as ...more

I started this thread hoping i'd see some good words about the 2010-2013 CRF250. I want to pick one up and restore it to stock, just wanted to make sure the engine wasn't a grenade.

And really? I've heard the opposite about most peoples recent yamahas. My 2015 never had any problems itself though.

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7/15/2021 8:39 AM

In addition to other mentions, 2013+ RMZ is also a bulletproof motor.

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7/15/2021 8:42 AM

Moto520 wrote:

2014+ yamaha YZ250F. 2010-2013 Honda CRF250. The Honda motor was pretty slow and i don't think it punished the motor as bad as ...more

duboiz wrote:

I started this thread hoping i'd see some good words about the 2010-2013 CRF250. I want to pick one up and restore it to ...more

The Yamaha is Bullet proof. They did have a rod issue on a small batch, But nothing major. As for the Honda, it had valve issues.

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7/15/2021 8:58 AM

14+ Yamaha is a solid motor. Ive seen those motors get thrashed and still running strong.

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Gone:
2006 CRF230F
2008 KTM 200 XC
2017 KTM 250 SX
2019 CRF250R
Current: 2021 YZ250F

7/15/2021 9:01 AM

Rmz hands down. For the 2010-2013 crf, if you get a 2010, make sure it has the 2011+ fuel pump and filter. If it doesnt, put one in, thats the only real issue that bike had

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7/15/2021 9:10 AM

From my experience....i know that the 2013 Honda CRF250 is reliable with no major issues. I had mine bumped up to a 270CC and had everything modded to make it as fast as possible. With the extra horsepower.....i haven't had any issues with the valves or anything. I've got around 90 hours on it and use it for stadium track races only. Stock...the power is so low that it isn't pushing the drivetrain hard at all. Good bike for me.

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7/15/2021 12:02 PM

We owned a 2013 crf250 r from new
Ran it up to 100 hours of hard moto, off-road racing
We put an RHC cam in it and ran the thinner copper Cometic base gasket , remap
Valves were still in spec at 100 hours when we put a piston it and sold it
The only “ issue” was the fuel filter needing replaced
Which is really a non issue , that’s a maintenance/wear item
The motor comes to life with just a few simple mods
I highly recommend the Honda

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7/15/2021 12:13 PM

I’ve had 5 YZ250FX’s and generally put about 150 hours on one before I sell it. “A” rider. I put piston/rings and cam chain in them at 100 hours. I’ve put one shim in one valve total. Change oil every 5 hours and keep a clean air filter in them and they’re bulletproof.

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7/15/2021 12:14 PM

RMZ would be my pick, those bikes handle real good and are pretty tried and true.

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Unleaded tastes a little tangy. Supreme is kinda sour, and diesel tastes pretty good.

7/15/2021 12:25 PM

i would say the ktm engines are the most bullet proof mechanically. they have a soo much better valve system with followers that evaryone else is now also doing but ktm has done it for 10 years.

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7/15/2021 1:09 PM
Edited Date/Time: 7/15/2021 1:11 PM

To summarize posts in thread, Bulletproof 250F engines include:
Honda
KTM
Suzuki
Yamaha

Anybody want to throw Kawi a bone so we can just say that they are all good?
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7/15/2021 1:18 PM
Edited Date/Time: 7/15/2021 1:21 PM

Dirty Points wrote: To summarize posts in thread, Bulletproof 250F engines include:
Honda
KTM
Suzuki
Yamaha

Anybody want to throw Kawi a bone so ...more

Another summarization would be that most every modern MX bike is pretty solid, we're past the days of the Kawazuki 250Fs and the amount of time I see get put on newer MX bikes with an 1/8th of the maintenance the older 4 strokes got is pretty incredible. If I was OP I'd find my favorite generation/make 250F at a good price and bite the bullet.

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Unleaded tastes a little tangy. Supreme is kinda sour, and diesel tastes pretty good.

7/15/2021 1:23 PM

Dirty Points wrote: To summarize posts in thread, Bulletproof 250F engines include:
Honda
KTM
Suzuki
Yamaha

Anybody want to throw Kawi a bone so ...more

We’ve had our share of kx250fs
07, 09, 11 and 12
Very good bikes as well
You know when I think about it all of our 4 strokes in general have been very good to us over the years
Dating back to the 98 yz400
4 strokes get a bad reputation in general but we’ve found in our experience the opposite
If maintained properly and not abused/ neglected they are very reliable machines
I have seen a couple with some issues , ( 04-05 kx250f valves )
( 05-06 rmz450 cases )

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7/15/2021 1:38 PM
Edited Date/Time: 7/15/2021 1:39 PM

RMZ motor is bulletproof. The clutch is a fail point, but overall it’s still the best bang for the buck if you’re not pro and don’t mind kicking.

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Two wheels, tacos, and tubes

7/15/2021 2:02 PM

Moto520 wrote:

2014+ yamaha YZ250F. 2010-2013 Honda CRF250. The Honda motor was pretty slow and i don't think it punished the motor as bad as ...more

Wrong man totally wrong about the yz250f motors, they are junk and have rod issues, once they snap you have a very over priced paperweight for an engine.

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7/15/2021 6:19 PM

07+ zooks were good too. I had an 07 that happily did 300 hours.

The real king of durability were the carb yzfs.

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7/15/2021 6:40 PM

2010+ RMZ for sure. My RMZs have been bulletproof. The only bikes I haven't had any issues with and I've owned every brand.

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7/15/2021 7:38 PM

who ever is saying the yamahas are bullet proof are nuts lmao,

the ones i have seen blow up the most are literally 2014 and up yamahas and 2010 and up hondas

lmao!!!

what ever they make carillo rods for is not your bulletproof bikes lmao...

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7/15/2021 7:38 PM

ben5020 wrote:

Wrong man totally wrong about the yz250f motors, they are junk and have rod issues, once they snap you have a very over priced ...more

you and i are alike lol

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7/15/2021 7:42 PM

and the rmz 2010-2015 is horrible lmao, they have idler gear issues when clutch heats up the shaft the idller gear sits on turns and the crankcases dont breath any longer and it snaps the case right behind idler gear.

same with kawi's but not only on kawis do you have to worry about that but you have to worry about the regulator-rectifier unit always going bad!



the most bulletproof 250 if maintained correctly with running a new air filter every 30min like they suggest using good oil like bel-ray foam filter oil not in an aresol can on dt-1 filters and using dt-1 triple stage filters when required is the best 250f money can buy!

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7/15/2021 7:53 PM

I am a pretty long lived service tech in the moto industry.
I’ve had to gap rings on Suzuki ds90s and shim valves on Honda Rc213v. So that’s a pretty wide brush stroke.
Beginning in about 2012 ish all the modern bikes got their crap together and really became reliable, that’s not meant to mean perfect.
With proper service, every major manufacturer makes a winner.
There are exceptions, the rare Friday evening bike so to say.
I ride mostly Ktm and husky, but they are likely the bikes I see the most issues with even with a smaller sample size, be it for poor maintenance, or plain bad luck.
The yamahas are typically the heartiest with Honda /Suzuki next and Kawasaki somewhere floating around second to fourth depending on what race we had recently.
Yamaha just didn’t have the same issues as the others.
Your mileage may vary, but this is a very large sample size and my mortgage has been paid many times over by plain lack of maintenance.

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7/15/2021 8:00 PM

How many 2014+ YZ250F’s have been sold compared to the others? How many have had several race seasons/years and are still going strong? Percentage of hardcore racers vs weekend warriors? As the undisputed “bike to have” since 2014, I would guess a higher than average percentage of them have been raced hard.

To those saying they see more Yamaha’s with issues than the other brands, could that be because there are more bikes out there and they are ridden harder/longer because they have a bulletproof reputation?

Just a few things to consider…

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7/15/2021 8:01 PM

jbonemalone wrote:

I am a pretty long lived service tech in the moto industry.
I’ve had to gap rings on Suzuki ds90s and shim valves on Honda ...more

Well said!

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7/15/2021 8:21 PM

WhatsStoppingU wrote:

How many 2014+ YZ250F’s have been sold compared to the others? How many have had several race seasons/years and are still ...more

i think you have a good point. i think we may see most failures out of the yamahas cause so many were sold.



but they still suck compared to the ktm lmao


unless your doing
long rod
high comp piston
del west valvetrain
copper race cut seats and guides
dual injection-vortex or get
cams
and ceramic crank bearings and cam bearings
and hinson clutch or gytr
07 yz250f cam chain slider to replace the shitty one that comes in it
tokyo mods cam chain adjuster
factory connection pull rod and shock setup to match and fork
22mm clamps- you never know what your getting. they dont label there clamps 22mm/25mm
pc pre filters
good fuel
tranny shot peened
grommeted electrical connectors installed on the wiring harness for pressure washing (after red bud that time everyone called MOTOXPERTS in indiana to have this done)









ktm has:

del west valves stock
cp piston stock
pankl rod (carillo) stock
shot peened tranny stock
grommeted connectors on harness and ecu connection stock
Billet hubs, the bearings can easily be replaced with ceramic and there is only two of them vs the three thats on jap bike rear hubs. thats a cost savings in my book.
bike has billet triples stock in 22mm offset
tourqe settings stamped on clamps so you dont have to get out your manual
and sag markings on fender.
tool less air box entry. (saves money cause time is money. I can do three air filter changes on ktms in the same amount of time i can a 2014 yamaha lmao)


just good luck bro is all i gotta say i honestly dont think i need to say any more.

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7/15/2021 8:26 PM

Cayden Thompson wrote:

2010+ RMZ for sure. My RMZs have been bulletproof. The only bikes I haven't had any issues with and I've owned every brand.

Hands-down the easiest 250 to maintain and keep in good shape for a ton of hours.

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Nobody ever told me, I found out for myself. You've got to believe in foolish miracles. It's not how you play the game, it's if you win or lose. You can choose. Don't confuse. Win or lose. It's up to you!

7/16/2021 7:17 AM

jbonemalone wrote:

I am a pretty long lived service tech in the moto industry.
I’ve had to gap rings on Suzuki ds90s and shim valves on Honda ...more

Good post, yet, at the time of my writing this, there's a thumbs down on it already. We've some queer cattle here, at times.

You've shimmed an RC213V?

Bloody hell, I'm surprised anyone has ridden one enough to need that. Padgets bike that Antsie has raced a few times at the IOM (and, I think, Michael Rutter at Macau) , they say has remained in perfect spec, and that's a very, Very rare RC213V that has had a real caning.

Anyone that want's to see a disaster, just go to YouTube and check out 'BMW knocks over an RC213V' ( or something like that) . It's not spectacular - well, it's pretty dull, but when you realize a bloke has just knocked over a $245,000 AUD bike with his 8000 Brit pound BM, it's a bit chilling. I think the damage ( so said 1 magazine) , from being knocked off it's stand, made it technically, a write off...... dizzy

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7/16/2021 8:51 AM

Rickyisms wrote:

RMZ would be my pick, those bikes handle real good and are pretty tried and true.

That's because they use the same technology as a Briggs and Stratton lawnmower engine

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7/16/2021 9:31 AM

Rickyisms wrote:

RMZ would be my pick, those bikes handle real good and are pretty tried and true.

BroFoSho wrote:

That's because they use the same technology as a Briggs and Stratton lawnmower engine

THE SAME CLOWN,WHEN EVER SOMETHING ABOUT SUZUKIS

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