08 YZ450 false neutral 3rd-4th


19 replies to this topic
  • CRFsean

Posted October 26, 2008 - 06:22 PM

#1

I was riding at Sand Mountain this weekend when my YZ450 hit a false neutral upshifting from 3rd to 4th. It was towards the end of the 3rd day of riding so the oil was getting old. But it only did it once and after that it was totally fine. Is this like semi-normal or do I have a problem? And I do use the clutch when I shift btw.

thanks

  • grayracer513

Posted October 26, 2008 - 06:52 PM

#2

Why aren't we assuming it was rider error?

  • husqy360

Posted October 26, 2008 - 08:14 PM

#3

i think that when its rider erorr it can only happen in 2nd or 1st, unless you hit the shiffter twice.
it never happend to my 06 450, it do jump somtimes cuz of rider erorr but it only goes 1 gear down.

  • grayracer513

Posted October 26, 2008 - 09:30 PM

#4

Indications that the problems are rider induced:

> Only happened once.

> Happened at the end of 3 days of riding.

  • gerbrony450

Posted October 27, 2008 - 09:46 AM

#5

i would run 20-50 oil when you plan to ride in the sand. Sand will make your bike run a lot hotter, and depending on the oil weight your running it may break dwn sooner. I also found 20-50 or even 10-40 make it a lot easier to find neutral on my 08.

  • Justin89

Posted October 27, 2008 - 10:23 AM

#6

I've had this problem while racing a couple times. Mine was when I was hard on the gas going from 3rd to 4th. IDK coud have been an error on my part :p but the bike went into 4th then popped out into neutral and into instand rev-limiter.:lol:

  • CRFsean

Posted October 27, 2008 - 10:32 AM

#7

I was running a 15w50 oil for that exact reason, a little thicker oil might not break down as fast. But I read on a different thread on here that short shifting under a load can induce this false neutral. Which I did because I was doing heelclickers and I wanted to just concentrate on those instead of shifting right before the upface.

  • qwik12beat

Posted October 27, 2008 - 12:56 PM

#8

I think i may be developing a problem with my 07. Everytime i go up a hill hard on the gas in third it hits a false neutral and then clunks its way ito fourth. It's a pita. I have even went up a couple hills with my left foot completely off the peg, and it still does it. I'm looking forward to some more posts.I would really like to figure this out aswell.

  • grayracer513

Posted October 27, 2008 - 02:13 PM

#9

Are you saying that, on the '07, you are already in third and then, under a load, it pops out and ends up in 4th?

That would be worn locking lugs on the sides of the 3rd "wheel" gear (output shaft) and the 5th wheel, along with damage to the #3 shift fork.

  • qwik12beat

Posted October 27, 2008 - 02:35 PM

#10

Yes that is what it does. So you are saying that the dogs on my third gear are probably starting to round, and that my #3shift fork may be bent?This is what i was leaning towards, but it's good to hear it from someone else.I guess my problem doesnt really have anything to do with a false neutral, although i do miss gears its usaully rider error.doh!

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  • grayracer513

Posted October 27, 2008 - 02:50 PM

#11

Yes that is what it does. So you are saying that the dogs on my third gear are probably starting to round, and that my #3shift fork may be bent?

That's what it sounds like.

  • MX926

Posted October 27, 2008 - 05:16 PM

#12

I never had a problem with my 06 450, but my 08 450 seems to find a false neutral between 3rd and fourth as well. It happens at least once a weekend. Seems to be when I'm hard on the throttle.

  • CRFsean

Posted October 27, 2008 - 08:53 PM

#13

I asked a tech at my work(mx shop) and he said it is possible to not shift fully into gear. Is that true? Can you miss a shift like that from 3rd-4th by being sloppy with the shifter?

  • grayracer513

Posted October 27, 2008 - 09:28 PM

#14

Of course you can. If you apply too much torque before the gears slide completely together, or just don't move the lever far enough, you miss.

  • CRFsean

Posted October 28, 2008 - 10:15 AM

#15

Of course you can. If you apply too much torque before the gears slide completely together, or just don't move the lever far enough, you miss.


ok cool, so as long as it doesn't do it a lot, im good.

thanks

  • Budlite

Posted November 04, 2008 - 07:42 AM

#16

In 2006 we bought a new 06 450. From the first day it had problems with the 2-3 shift. It also would drop out of 3rd from G forces like jump faces. I changed shift forks, shifter arms, and 4 gears but could not fix it. A lemon ? Possibly but it could not be trusted. I traded it off with less than 15 hours on it for an 06 450 Honda. I do still have my 05 YZ250 that I think is the best bike ever made.......

  • mazzuca21366

Posted November 06, 2008 - 10:30 AM

#17

My 2008 is hard to get into neutral when running. But the bike only has 12 hours of run time on it.

  • Kasjok

Posted November 06, 2008 - 10:38 AM

#18

I have a 08 aswell, but I don`t think its too difficult once you have got used to The Feel. However, my dad misses the neutral 4 times out of 5.

  • grayracer513

Posted November 06, 2008 - 11:21 AM

#19

My 2008 is hard to get into neutral when running. But the bike only has 12 hours of run time on it.

That's clutch drag. Totally different problem. Start with adjustment.

  • mx614

Posted November 06, 2008 - 02:47 PM

#20

False nuetrals are a common problem on these bikes when being ridin aggressive. Thats why the shift forks were changed for 09, many many complaints of this from racers.





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