YZ400 wheelie problem?


9 replies to this topic
  • r6_300z

Posted August 01, 2006 - 12:18 PM

#1

i just got my yz 400 about a week ago and it ran great, i got pretty good at 4th gear wheelies and i can do them for about 1 mile or 1 1/2 at the very max and then today i did a small low rpm'd wheelie and shortly after my bike sputtered and then shut off. there was plenty of oil in it and i dont think im doing them long enough for the motor to start to have problems. has any one else had a problem like this with their 400????

  • kpflyingv

Posted August 01, 2006 - 12:23 PM

#2

I'd check fuel before anything else. A float stuck, fuel filter, fuel tank volume, etc.....Doesn't sound too serious.

  • Baron Von Beard

Posted August 01, 2006 - 12:28 PM

#3

Wheelies can play hell on fuel delivery. It's very possible that you have a stuck float. Pull the bowl off and check 'er out.

  • r6_300z

Posted August 01, 2006 - 12:33 PM

#4

well it was hard to kick over after wards but now it can start up but i dont wanna hurt the motor cause to me it sounded like there was an oil problem or somthin

  • 02YZ426

Posted August 01, 2006 - 12:46 PM

#5

Check you float height and make sure its in spec. Also you can loosen the top bolt on the oil line just for a sec. to make sure the oil pump is working.

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  • One Louder

Posted August 02, 2006 - 01:20 AM

#6

It's hard for me to imagine that a wheelie could do any seriouse damage to this motor :thumbsup: sounds like a fuel problem to me.
By the way check this out...
http://www.stuntking...heele_512mb.wmv

I think your bike is fine, maybe the carb need a good cleaning.

  • r6_300z

Posted August 02, 2006 - 05:47 PM

#7

well i drained my oil and it looks like chocolate milk so im replacing the head gasket but thanks for the advice

  • kawirider

Posted August 02, 2006 - 09:02 PM

#8

Brown oil means a blown head gasket? I thought that it only means that some dust has been sucked up your breather tube.

  • peeweesp

Posted August 02, 2006 - 10:22 PM

#9

Brown oil means a blown head gasket? I thought that it only means that some dust has been sucked up your breather tube.



he drives it onroad not much dust

  • ovrrdrive

Posted August 03, 2006 - 01:03 AM

#10

Brown oil means a blown head gasket? I thought that it only means that some dust has been sucked up your breather tube.


Chocolate milk means water in the oil. That is most likely a blown head gasket or a cracked case.





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