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Yamaha YZ450F 2014


Last review by Gode
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Yamaha YZ450F (2014)


Owner: Dklassen
Added on January 01, 2016
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Problem with 14 450s

Yamaha YZ450F 2014

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56 replies to this topic
  • boegey

    TT Member

74 posts
Location: Australia

Posted August 06, 2014 - 12:54 AM


Has anybody heard of this problem with the shift shaft assy and the water pump impeller with the 450s I know people are having problems with the 250s but havnt heard any problems with the 450 and I read they brought out updated part for the shift assy but not the impeller for the 450 is it worth doing the swap I asked my dealer and they knew nothing of the problem with either bikes.

  • boegey

    TT Member

74 posts
Location: Australia

Posted August 06, 2014 - 12:55 AM


http://www.thumperta...here-to-report?
This is the post about the 250s

  • drtrcr400

    TT Bronze Member

293 posts
Location: Oregon

Posted August 06, 2014 - 04:57 AM


No problems here so far. 85 hours and counting.

  • grayracer513
42,929 posts
Location: California
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Posted August 06, 2014 - 07:06 AM


The shifting problem is the only one that may affect the 450.  The 250F uses a different impeller assembly that the big bike.

 

The shift problem is the same issue that occurred with some '06 models:

 

http://www.thumperta...r/#entry4050685



  • DanielMerrick

    TT Member

76 posts
Location: Ontario
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Posted August 06, 2014 - 07:32 AM


The shifting problem is the only one that may affect the 450. The 250F uses a different impeller assembly that the big bike.

The shift problem is the same issue that occurred with some '06 models:

http://www.thumperta...r/#entry4050685


So it's the index leaver bearing ? The fellas at my dealership didn't even know about the problems with the 250s I had to show them...

  • byz250F

    TT Bronze Member

218 posts
Location: Michigan

Posted August 06, 2014 - 08:52 AM


no problem with my 14 YZ250f or my brothers 14 YZ450F....both have been top notch



  • WR450HOOLIGAN

    TT Newbie

23 posts
Location: Arizona
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Posted August 06, 2014 - 09:07 AM


No problem with either on my 14 450 yet (30 hours). I did buy the new shift stopper with a bushing rather than the bearing but i haven't tore into it because i haven't heard of it being issue on the 450 even though they say it's the same part number as the 250?? I should probably change it but i'm not too worried at this point.. However i will feel really dumb if it messes up my engine. A lot of people have higher hours on their 14 450's with no stopper problem though..



  • grayracer513
42,929 posts
Location: California
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Posted August 06, 2014 - 10:36 AM


The '06 was supposed to be subject to the same problem, but I've owned two, one with over 200 hours, and mine that has over 300, and no problem with either one.

I have seen the things fail, though.

  • boegey

    TT Member

74 posts
Location: Australia

Posted August 06, 2014 - 01:07 PM


So pretty much your better off just replacing th part with the new upgraded lever for peace of mind last time I asked my dealer about it they knew nothing so could I just tell them to order the stopper lever off the '15 since that has the updated part stock is it the exact same part and do I need to order the new screw with washer as it was also updated

  • grayracer513
42,929 posts
Location: California
Garage View Garage

Posted August 06, 2014 - 06:39 PM


It might be necessary to use the new bolt, etc., because of a dimensional change or something.  May want to check with the guys in the shop about bulletins.



  • boegey

    TT Member

74 posts
Location: Australia

Posted August 06, 2014 - 10:52 PM


Ordered the lever and the screw this arvo the shop said it has the same part number but will be the new part

  • boegey

    TT Member

74 posts
Location: Australia

Posted August 06, 2014 - 10:53 PM


There is none in the country though (aus) so I have to wait probably coz everyone is buying the new parts

  • DanielMerrick

    TT Member

76 posts
Location: Ontario
Garage View Garage

Posted August 10, 2014 - 07:47 AM


Canada has lots in stock, got mine on order, it totalled out to be under 25$ for everything,

When I was at the dealer they couldn't find anything so we compared the 2015 Trans to my 2014 and found the different part numbers, ordered the new ones.. Hope it comes in soon, gives me an excuse to take a look inside !

  • yzUSMCf

    TT Bronze Member

460 posts
Location: California

Posted August 14, 2014 - 07:01 AM


I have not heard the 14 450's actually having the problem. But many cases on the 250 especially the shift stop lever which is a concern for us with 450's because they use the same part number and has been changed for 2015 bikes. But the water pump impeller is a different part # from the 250 and 450. The failure of the shift stopper can destroy the engine . Its a 10$ part so for price of mind I ordered one of the new part # to put on my bike just in case its a 30 min job no big deal.as you can see the shift stopper now has a solid bushing that replaces the Bering and eliminates the issue cost me 40$ total with shipping for the lever gasket and screw. Search 14 mechanicals and you can read a bunch on the subject on the 250's, part numbers ect.

Attached Thumbnails

  • 1408028316688.jpg


  • boegey

    TT Member

74 posts
Location: Australia

Posted August 14, 2014 - 07:36 PM


Yer same Idea I had better to replace $50 worth of parts rather than do a $4000 plus rebuild

  • nicky-san

    TT Member

54 posts
Location: Quebec

Posted August 15, 2014 - 06:54 PM


No issues with tranny on mine at 88 hrs but had issue with the timing chain that has skipped 2 tooths and was badly worn out despite oil change at every 2 rides ( hard to believe i know) Bike was running really bad but nothing broken.
Just flipped it to a 2015 - 450 earlier this week


I noticed the mapping is different than the 2014 be cause it does not pop on decel or sudden gas shut off.it is not barky down low either.nothing was mentionned about new mapping on the intro so i wonder if this is true- todays conditions where really muddy so i have to retest to be sure.......

  • WR450HOOLIGAN

    TT Newbie

23 posts
Location: Arizona
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Posted August 16, 2014 - 11:08 PM


Finally got around to putting the new shift stopper in. Easier than I expected. If you use a zip tie to hold the spring on the stopper it makes it actually possible to install. ImageUploadedByThumper Talk1408259240.320783.jpg
That shows how I used the zip tie to hold everything together as well as compress the spring.
ImageUploadedByThumper Talk1408259309.873435.jpg
Old vs new

  • yzUSMCf

    TT Bronze Member

460 posts
Location: California

Posted August 17, 2014 - 07:26 AM


Thanks for posting!

Did you use lock tite on the stopper bolt?

  • WR450HOOLIGAN

    TT Newbie

23 posts
Location: Arizona
Garage View Garage

Posted August 17, 2014 - 07:33 AM


Thanks for posting!

Did you use lock tite on the stopper bolt?

Yes i did the blue locktite



  • yzUSMCf

    TT Bronze Member

460 posts
Location: California

Posted August 17, 2014 - 07:37 AM


Yes i did the blue locktite

just checking . I'm doing this today with a few other things .





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