2017 yz250 hole in case

cody41
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cody41
Edited Date/Time 10/31/2017 5:41pm
2017 yz250 with 16 hours. Was told the bolt that holds the water pump gear and power valve gear backs out and causes this. Anyone else have this happen ? If so, did yamaha cover it ?

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LungButter
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LungButter 10/29/2017 7:36pm
10/29/2017 7:36pm
Dang.

Had a lot of YZ 250s over the years. Never seen that before.
chump6784
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chump6784 10/29/2017 7:40pm
10/29/2017 7:40pm
Damn that sucks. Keep us updated on how yammy deal with this
Sheriff245 10/29/2017 7:49pm
10/29/2017 7:49pm
Had this happen on a brand new 125. I had the bottom end apart before ever starting it though so it was on me.

I’ve never seen something like this happen to a new, stock bike.

The Shop

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BAD10
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BAD10 10/29/2017 7:54pm
10/29/2017 7:54pm
Nope. By a new outer case and be done with it.
TeamGreen
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TeamGreen 10/29/2017 8:22pm
10/29/2017 8:22pm

Yamaha Sport Contact Us

Yamaha Motor Corporation, USA
6555 Katella Avenue
Cypress, CA 90630

Sales, marketing and distribution of Motorcycles, ATVs, Snowmobiles and Race Kart Engines.

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(800) 962-7926
racerray909
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racerray909 10/29/2017 10:23pm
10/29/2017 10:23pm
Yes I had that happen to our 15. But never on our 09 Yamaha cover it? Depends on who you know if they warranty it.

But watch out. When They retap the bolt in the crank. The process push the crank over a bit that it cause friction on the bearing and we killed the crank. Really weird.
Lucky13FIST
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Lucky13FIST 10/29/2017 10:31pm
10/29/2017 10:31pm
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


cmotodad
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cmotodad 10/29/2017 10:49pm
10/29/2017 10:49pm
Have a buddy that it happened twice on 2 different YZ250's
Nik.M
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Nik.M 10/29/2017 11:10pm
10/29/2017 11:10pm
I have seen this quite a bit, the case can be welded up with no issues, but the bad part is that the bolt usually damages the thread in the crank. Can all be repaired, just take your time with the thread. I last yz we got, l took the case of and loctite and tightened the bolt before even starting the bike and no problems. Seems to be a bit on the loose side from factory, maybe not every unit, but still common enough.
Acidreamer
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Acidreamer 10/30/2017 1:19am
10/30/2017 1:19am
Lucky13FIST wrote:
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount...
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


10 hour cranks bro
chump6784
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chump6784 10/30/2017 1:22am
10/30/2017 1:22am Edited Date/Time 10/30/2017 1:41am
Lucky13FIST wrote:
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount...
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


Thats shit. After reading the thread where KTM covered the engine that grenaded at 43 hours and then this reply I will be thinking long and hard about which bike I replace my YZ with.

Just checked the owners manual, says the crank should be inspected every 12.5 hours. That's crazy
ducknuts
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ducknuts 10/30/2017 4:15am
10/30/2017 4:15am
Lucky13FIST wrote:
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount...
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


Acidreamer wrote:
10 hour cranks bro
Seriously?
dedi684
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dedi684 10/30/2017 4:32am
10/30/2017 4:32am
My 16 is my 5th yz 250. Just broke 3rd gear at 25 hours. Bummed the rest have been good to me.
RACERX69
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RACERX69 10/30/2017 4:33am
10/30/2017 4:33am
But wait, I'm confused. I thought only KTM's had these type of issues!! Wink
Crush
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Crush 10/30/2017 4:52am
10/30/2017 4:52am
Lucky13FIST wrote:
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount...
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


Acidreamer wrote:
10 hour cranks bro
dafuq!
sandman768
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sandman768 10/30/2017 4:52am
10/30/2017 4:52am
dedi684 wrote:
My 16 is my 5th yz 250. Just broke 3rd gear at 25 hours. Bummed the rest have been good to me.
Loved all y YZ 250"s. 99,2000,2001, 2005 &2008. For some reason every newer one I had, the transmissions ate gears faster & faster. I got tired of replacing transmissions.....could not make it through a full season on one tranny. I have never seen the crank drive gear bolt/nut back off.....to the O/p, call Yamaha customer service & be reasonable & respectfull to whoever you speak with, it may take a few conversations, but usually you can work out something to help. I have had to contact Yamaha & Ktm customer service a few times, if the rep does not know how to handle the situation , give them a solution, ex: how about a parts credit at my dealer? How about parts & no labor ect. Something better than nothing....always worked for me....good luck...tell us how you make out....
TrailDigger 10/30/2017 6:58am
10/30/2017 6:58am
Not a single person, unless you are a Pro. Maybe not even then, aside from a top end.

Should be able to go at least 40 or 50 hours without opening the motor for the average joe.

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Motofinne
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Motofinne 10/30/2017 7:21am
10/30/2017 7:21am Edited Date/Time 10/30/2017 8:00am
What? Yamaha really told you that? There is no way that i would accept that as an answer. That is a disgrace.

Did your dealer tell you that or Yamaha USA?
tp4
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tp4 10/30/2017 7:49am
10/30/2017 7:49am
that is BAD..I will never buy a yamaha after seeing that holly shit 12 hours for a crank inspection...Crazy!
..
Acidreamer
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Acidreamer 10/30/2017 8:13am
10/30/2017 8:13am
Lucky13FIST wrote:
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount...
My 16 did the same thing, As well as my buddies 16. I only had about 20 hours on it. Yamaha said that with the amount of hours I had, I should have replaced the crank twice. So they didn't warranty anything.


Acidreamer wrote:
10 hour cranks bro
I think its horse shit that that nut came loose. That nut should have been loctited and torqued from the factory.

Id look at their service manual and see if that nut is a part of the crank inspection.

Also my service manual for an 05 yz250 says inspect every 5 races not replace every 10 hours. Im 90% sure pulling right side cover is not apart of it.


zlowery
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zlowery 10/30/2017 10:06am
10/30/2017 10:06am
Same thing happened to a friend of mine in ohio. 5 hours. Crank bolt backed out. Yamaha covered it. Stay on them.



smoothies862
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smoothies862 10/30/2017 11:10am
10/30/2017 11:10am
you would think Yamaha would cover that. this news spreads faster than good. killing potential buyers.
RCF
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RCF 10/30/2017 11:43am
10/30/2017 11:43am
TrailDigger wrote:
Not a single person, unless you are a Pro. Maybe not even then, aside from a top end. Should be able to go at least 40...
Not a single person, unless you are a Pro. Maybe not even then, aside from a top end.

Should be able to go at least 40 or 50 hours without opening the motor for the average joe.
We have two 16 KTM 250 SX s with over 200 hours on the original cranks, he's a pro level off-road racer. At one time we thought about switching to Yamahas I dodged a bullet there.
Harry Backmon 10/30/2017 12:35pm
10/30/2017 12:35pm
Never seen that before. However, third gear dogs wearing out is a known issue. Yamaha, fix your dang bikes!
yz763
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yz763 10/30/2017 12:47pm
10/30/2017 12:47pm
I just did the crank and bearings in my 2013. Should I have loctited that bolt? I watched the Rocky Mountain video and used the washer to lock the gear and tighten the bolt.
coastlinecascot 10/30/2017 12:52pm
10/30/2017 12:52pm
I use blue locktite on just about everything on the clutch side including the tranny bearing retainers on the inside
BlueTrailblazer 10/30/2017 1:01pm
10/30/2017 1:01pm
I had this happen on a 99 yz250. When I took it apart I found that the output shaft on the crank was too short and the outside gear ( can't remember if it was for the water pump or power valve) was barely splined onto the shaft. If the gear was say 1/4" thick, then it probably had about 1/16" actually splined onto the shaft. I was baffled to say the least, maybe it was designed that way to save weight or something. I was not the first owner so perhaps it was the wrong crank installed on the bike somehow.
dedi684
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dedi684 10/30/2017 1:16pm
10/30/2017 1:16pm
dedi684 wrote:
My 16 is my 5th yz 250. Just broke 3rd gear at 25 hours. Bummed the rest have been good to me.
sandman768 wrote:
Loved all y YZ 250"s. 99,2000,2001, 2005 &2008. For some reason every newer one I had, the transmissions ate gears faster & faster. I got tired...
Loved all y YZ 250"s. 99,2000,2001, 2005 &2008. For some reason every newer one I had, the transmissions ate gears faster & faster. I got tired of replacing transmissions.....could not make it through a full season on one tranny. I have never seen the crank drive gear bolt/nut back off.....to the O/p, call Yamaha customer service & be reasonable & respectfull to whoever you speak with, it may take a few conversations, but usually you can work out something to help. I have had to contact Yamaha & Ktm customer service a few times, if the rep does not know how to handle the situation , give them a solution, ex: how about a parts credit at my dealer? How about parts & no labor ect. Something better than nothing....always worked for me....good luck...tell us how you make out....
So I should get a 350 and a 250sx ( I didn't like my 15) and never look back? That's what I'm thinking Smile
PJRAUS
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PJRAUS 10/30/2017 1:47pm
10/30/2017 1:47pm Edited Date/Time 10/30/2017 1:49pm
Harry Backmon wrote:
Never seen that before. However, third gear dogs wearing out is a known issue. Yamaha, fix your dang bikes!
I've been wondering about that....heard about the issue with third...I didn't rack up enough hours on my last yz 250 (09) to have an issue.
So it's the dogs that round off or break then? Is it just a poorly designed part or poorly made? Is it third gear drive or driven?
Does it explode and send metal through the rest of the tranny causing more damage?
Just curious cause I'm on the hunt for a decent used one for a decent price...don't think I'll find one though.
People here are still asking $4 k plus for an 06 !

It's a wonder some enterprising company hasn't come up with an after market replacement for these parts...there's a lot of yz 250' s out there and Yamaha is showing no signs of ever ceasing production or ever re designing them either..

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