YZ450F 18 problems, already

Lightning78
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Huntington Beach, CA US
11/23/2017 6:28pm
DAG wrote:
Agreed on the air filter. Ran one sand race and realized that I better change it after every moto when I saw the build up on...
Agreed on the air filter. Ran one sand race and realized that I better change it after every moto when I saw the build up on the filter and around it. I have switched to a Twin Air and feel better that at least it won't blow through the porous foam of the stock and GYTR filters....now I just need to buy 2 more!

My starter so far has been fine but I did have it once when it was hard to start. Was getting nothing when cranking over but didnt wind out the starter for more than 3 or 4 seconds either. Let it sit for 30 seconds and it fired right up. Vapor issues?

Thanks for posting your issues and I'll keep an eye out on that fuel pump.
Annnnd doesn't that defeat the purpose of having electric start for quick restarts during a race so-as to not lose the extra time spent kicking the bike to life? 30 seconds wether you're an ama pro or novice would kill any chance at a good result right? Not trolling just saying ..... Also these fuel pump issues render a bike useless when they go out and are super expensive to replace. It's unfortunate a part as simple as a fuel petcock that is nearly foolproof and bulletproof has to be replaced with a fuel pump due to fuel injection that's creating a potential weak point that has otherwise never been a real concern. And yes I know I'm about 10 years behind on making this comment but it seems to me that as progress in technology Roll on, electrical gremlins that cannot be fixed on a trail for remedied the day of a race unless you have the part are now a reality that is a paramount concern to any rider or racer that they no longer have control over when they go bad to fix.

But hey I'm still writing to strokes so I necessarily don't have a leg to stand on here actually scratch that I started writing for strokes and went back to the two-stroke because of its simplicity fun and retains my love for riding nothing against four stroke riders but I think I'm off the train on this stuff LOL
The Candyman
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11/23/2017 6:33pm
I got another question...mad bro?
mx317 wrote:
Nope
Ok good thought you were about to cry
Rockinar
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Katy, TX US
11/23/2017 7:11pm
Frenchie The Troll got everyone fighting in less than 2 pages. I thought it would take 3 or 4.


Frenchie The Troll wins the internet today.
dirtmike86
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Grand Terrace, CA US
11/23/2017 7:30pm
dirtmike86 wrote:
No wonder millsaps crashed.
Gixxxerboy wrote:
Says the guy that rides a Kan't Take Much!!!! Lol
Was a joke but ok. I own yamahas.

The Shop

malachi177
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B.C., BC CA
11/23/2017 7:40pm Edited Date/Time 11/23/2017 9:30pm
malachi177 wrote:
That's a good question. Filter skins are awesome. Due to the air box placement, sand tracks have always been a pita on this design. 250 and...
That's a good question. Filter skins are awesome. Due to the air box placement, sand tracks have always been a pita on this design. 250 and 450f


...btw the starter issue is common with KTM's too. Just the pumpkin eaters that think they're made by God himself will argue this fact. That is why I like kick start...the new bikes are sooo easy to start hot or cold these days. In a few years the electric start gremlins will be worked out and be bulletproof.
mx317 wrote:
You realize that KTM has had electric start since the early 2000s don't you? They had any bugs worked out long ago lol.
Riding buddy's '16 Husky 450, co-workers '15 Husky 501, and one of my kids friends '17 250FE have all had issues with their electric start. Not just on one occasion. Three newer Austrian models...so your point is? Doesn't matter that they've been around since 2000. There are issues with them, not all. That was the point I was saying to the OP.
mx317
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TN US
11/23/2017 8:12pm
I got another question...mad bro?
mx317 wrote:
Nope
Ok good thought you were about to cry
Nope
Acidreamer
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Mansfield, OH US
11/23/2017 8:19pm
Thats why you dont buy a fuckin yamaha. Even their guitars sound like balls
1
kzizok
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AS US
11/23/2017 9:01pm
“But I'm still writing to strokes so I necessarily don't have a leg to stand on here actually scratch that I started writing for strokes and went back to the two-stroke because of its simplicity fun and retains my love for riding nothing against four stroke riders but I think I'm off the train on this stuff LOL”.

Sorry, couldn’t resist. Just thought it was funny!Laughing Laughing
MiTB
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AL US
11/23/2017 11:03pm
can someone please post pictures of the airfilter area
1
cali11
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Federal Way, WA US
11/24/2017 12:12am
Joe512 wrote:
Have you checked the torque on your sprockets? Most likely the cause of all your problems.
Dude that's getting so old, come up with some of your own shit
FIREfish148
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5477
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Kirkland, WA US
11/24/2017 12:25am
Rockinar wrote:
Did you try a factory ECU?
Why u gotta hate so hard
11/24/2017 12:54am
MiTB wrote:
can someone please post pictures of the airfilter area
Or their girlfriend. This thread is useless without pictures
2
David934
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CZ
11/24/2017 1:04am
Rockinar wrote:
Did you try a factory ECU?
no OEM ECU with map "HARD"
MaxFranchie: It was a joke
David934
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CZ
11/24/2017 1:05am
My friend have the one, few hours on it, still no problems
brimx153
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IE
11/24/2017 1:07am
sand got in the airfilter , he said he put a new piston in it after that . imo you have to strip the engine complete when this happend .imo the nub of problems could all be caused by the this
same thing .
newmann
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US
11/24/2017 7:33am
racerx217 wrote:
1st post and saying a Yamaha is unreliable.... troll much?
mattyhamz2 wrote:
Was thinking the same thing.
I'll third that.
But is he wrong?

Frenchie comes on here with a fairly detailed list of issues as well as a few solutions and gets called a troll. Seems to me he backed up most of his stuff unlike the other thousand trolls who have come before.
mxb2
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Bowie, MD US
11/24/2017 8:06am
Joe512 wrote:
Have you checked the torque on your sprockets? Most likely the cause of all your problems.
cali11 wrote:
Dude that's getting so old, come up with some of your own shit
X2, old , corny.
11/24/2017 8:37am
Agreed. For the faithfuls they should take a few reads:

http://m.vitalmx.com/forums/Race-Shop,42/2015-YZ250F-PROBLEMS,1285291?p…

http://m.vitalmx.com/forums/Moto-Related,20/15-16-Yamaha-frame-cracks,1…

I have a 15 250f and a 16 450 so far the issues weve had:

- (250) Fuel Injector seal crushed from factory, Ruined motor within 8 hours. Huge fight with Yamaha, finally got fixed after a lot of time/money wasted. Ruined my view of the company and the Rock River team.

- (250) Blown out schrader valve at 25 hours in rear shock (kyb not yz)

- (450) Cracked frame. Yet another month in the summer fighting with Yamaha... not being able to ride the bike.. just like my 250 the summer before

- (450) Manufactoring casting flaw that blew the rear shock seals. (Not yz but kyb)

I rather not get into the preventive headaches you have to do with these bikes... all I can say is the electronics are straight out of the 70s, make sure you water proof the wiring harness. (Remember Martins bike probs in 15? This is why they wouldn’t wash his bike in between motos)

All the brands have their issues, and after so many good bikes, one lemon/flaw is bound to make its way on the market, unlucky for me, and by the sounds of it this guy as well, we got those bikes (I did twice). It sucks, when you buy a bike now that are pushing 5 digits in price, you dont expect flaws, nor can you afford one.

However, what matters is the brands willingness to see problems and react in a ethical way to make it right. My experience with Yamaha was complete shit, and their midwest connection (Rock River) was even worse. Its why I’m looking at a ktm for next year and not the new yami.

I really dont find jokes about this to very funny. The dude spent a lot of money for a brand new race bike expecting for it to be the quality to be just that, and as long as general/common maintence is taking place, you should expect no less.
TeamGreen
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Thru-out, CA US
11/24/2017 9:05am
I just don't get it.

I ride, A LOT.

I maintain and work on my scoots A LOT... Well, for the most part...

I don't have the kind of problems that I often read about up in h'yar. On the it her hand, I'll toss most stock parts in the trash that're known to be a problem. I take changing oil and air filters pretty damn seriously (a lesson YOU WILL LEARN the "hard way" in Baja when you don't do it right). I maintain batteries and things that a lot of people take for granted. I have my frames inspected by people that know what to look for. I check my valves, my clutch, my spokes and...PEEELOUT WARNING: I check my Damn SPROCKET BOLTS, Bro!
Most importantly...
I use mechanics and tuners that do amazing work.

So, no...I can't identify with any of this.

Btw, I've been a part of a team that has "run and won" with Yamahas for the last 3 years.
TeamGreen
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Thru-out, CA US
11/24/2017 9:07am
Joe512 wrote:
Have you checked the torque on your sprockets? Most likely the cause of all your problems.
cali11 wrote:
Dude that's getting so old, come up with some of your own shit
mxb2 wrote:
X2, old , corny.
Uh, damn...y'all are getting crusty. That shit is STILL funny.
kzizok
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AS US
11/24/2017 9:08am Edited Date/Time 11/24/2017 9:09am
Joe512 wrote:
Have you checked the torque on your sprockets? Most likely the cause of all your problems.
cali11 wrote:
Dude that's getting so old, come up with some of your own shit
mxb2 wrote:
X2, old , corny.
X3.
Melicar
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Location
Sunny, CA US
11/24/2017 9:13am
I didn't read all the thread so If someone mentioned it already I'm sorry, but I find it to be extremely important to always check the torque on your sprocket bolts.
11/24/2017 9:15am
I'm surprised we've made it this far without a "should have bought a KTM" post.
Joe512
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Conowingo, MD US
11/24/2017 9:19am
Melicar wrote:
I didn't read all the thread so If someone mentioned it already I'm sorry, but I find it to be extremely important to always check the...
I didn't read all the thread so If someone mentioned it already I'm sorry, but I find it to be extremely important to always check the torque on your sprocket bolts.
Got you buddy. It also made everyone's day. So much so that 3 people took the time to thank me for posting it.
Skerby
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Mayes County, OK US
11/24/2017 9:26am
They need to develop a yz450CE for cheap edition. Same chassis, but with a carb and kick start. I had plenty of good times riding bikes with kick starts, and 450s never really needed FI anyways. I was thinking about buying a new crf250, that was before i read this thread.
11/24/2017 9:35am
TeamGreen wrote:
I just don't get it. I ride, A LOT. I maintain and work on my scoots A LOT... Well, for the most part... I don't have...
I just don't get it.

I ride, A LOT.

I maintain and work on my scoots A LOT... Well, for the most part...

I don't have the kind of problems that I often read about up in h'yar. On the it her hand, I'll toss most stock parts in the trash that're known to be a problem. I take changing oil and air filters pretty damn seriously (a lesson YOU WILL LEARN the "hard way" in Baja when you don't do it right). I maintain batteries and things that a lot of people take for granted. I have my frames inspected by people that know what to look for. I check my valves, my clutch, my spokes and...PEEELOUT WARNING: I check my Damn SPROCKET BOLTS, Bro!
Most importantly...
I use mechanics and tuners that do amazing work.

So, no...I can't identify with any of this.

Btw, I've been a part of a team that has "run and won" with Yamahas for the last 3 years.
You and I both.

Normally get a bike, go through it, grease everything, torque checks, very strict oil changes/filters, air filter every ride... you name it. I regularly check over my bike every ride. Why would you assume other wise? Ive seen people who treat there bikes like shit and never have issues, or they will but its not until later on from general abuse.

When I pay 10 grand almost for a new 450, Im not expecting to take it to a mechanic to inspect the frame/welds, the electrical wiring, or all the seals on the bike, and im sure as hell not letting a dealership work on it (I worked in one in highschool, you wouldn’t believe the general mechanics/techs lack of care/knowledge for race bikes). That should all be done when I buy the final product, and if its not and the bike/parts fails outside the bounds of allowable time/circumstances, then I expect the manufacture to own up.

Im glad you’ve never had to go through the headache of a manufacture error/flaw. Speaking solely about my experience with Yamaha, it is the biggest headache, and you’ll paying for a broken bike for months before it gets settled. Just because youve never had a lemon, doesnt mean they don’t happen. Dont be that guy that assumes its never the manufactor and always the lack of maintenance because YOU’VE never had an issue.

Here are photos of my frame crack, and my injector seal that was incorrectly installed. No amount of maintenance would of fixed this. This was poor assembly and poor quality check on that weld. (Frame cracked under 20 hours)





TeamGreen
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Thru-out, CA US
11/24/2017 9:42am
In all fairness to m121c, I have seen a cracked frame.
Ryno23
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Manhattan, MT US
11/24/2017 10:12am
TeamGreen wrote:
Since 2013... KTM 450SXF HUSKY FE350S HUSKY FX350 HUSKY TE150 The closest thing I've had to a starter problem was on my FE...the harness got corroded...
Since 2013...
KTM 450SXF
HUSKY FE350S
HUSKY FX350
HUSKY TE150

The closest thing I've had to a starter problem was on my FE...the harness got corroded due to the time I sunk it...in the ocean. I've never bought a new starter. Only the TE has a Kickstarter as back up.

The worst electric start systems I've had are:
2009 KLX450R
Any Year CRF450X
CRF450X. I agree!!!
11/24/2017 10:34am
This is why i will never buy another yamaha. Less than 50 hours



Brent
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Party in Temecula, CA US
11/24/2017 11:21am Edited Date/Time 11/24/2017 11:25am
mattyhamz2 wrote:
Was thinking the same thing.
I'll third that.
newmann wrote:
But is he wrong? Frenchie comes on here with a fairly detailed list of issues as well as a few solutions and gets called a troll...
But is he wrong?

Frenchie comes on here with a fairly detailed list of issues as well as a few solutions and gets called a troll. Seems to me he backed up most of his stuff unlike the other thousand trolls who have come before.
Shit like this is why this site is hard to read anymore in the off season.

Guy comes in here and posts legitimate technical questions about a new motocross bike and you children start fucking with him.

sure, the Race Shop would be the better place to post a tech question, but why give this guy so much bullshit?

2

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