04 Wr450 Engine Locked Up, Then Was Ok?


7 replies to this topic
  • DS-WR450F

Posted December 26, 2008 - 06:17 PM

#1

So, here's the story. I have had this bike less than a week. It was around 30 degrees today, and I just finished installing the water temp sensor for the Trail Tech Vapor. I re-filled with coolant, and started the bike. It started right up, and ran a little rough, choked, in the cold air. Then, after less than a minute, I hit the kill switch, and checked the coolant. When I tried to re-start the engine, the starter wouldn't crank the motor. I thought maybe it was a low battery, so I tried to kick it, and the motor would not budge. I am 230 lbs. So then I tried moving it with my arm, and all of a sudden it turned. I hit the starter button, and it fired right up again, and ran fine. I let it run untill the water temp was at 185, then shut it down again. Any ideas?

  • Mark_NZ

Posted December 26, 2008 - 06:59 PM

#2

my 06 sometimes locks up when I use the kick start - putting the bike in gear and rocking it fixes the problem - might have happened once on electric start too.

  • tribalbc

Posted December 26, 2008 - 07:13 PM

#3

Normal, just put it in gear and rock the bike a little bit.
PITA is when it happens when you stall at a checkpoint :busted:

  • DS-WR450F

Posted December 26, 2008 - 10:26 PM

#4

Thanks!

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  • Asgeir

Posted December 28, 2008 - 06:47 PM

#5

This happens because the cylinder is filled with dense mixture of air and fuel that does not compress very easily.

Holding steady pressure with your foot on the kickstart for a few seconds usually does the trick.

Usually happens when the motor stalls suddenly, but luckily it´s not always like that.

Rocking method should work as well, have not tried that myself.

  • JSanfilippo

Posted December 28, 2008 - 09:28 PM

#6

It'll hapen to every WR rider eventually. Yamaha should have put a manual decomp lever on these bikes for this reason.

  • bluebreadtruck

Posted December 28, 2008 - 09:37 PM

#7

they did on the old ones like mine!

  • Mark_NZ

Posted December 29, 2008 - 12:03 PM

#8

This happens because the cylinder is filled with dense mixture of air and fuel that does not compress very easily.

Holding steady pressure with your foot on the kickstart for a few seconds usually does the trick.

Usually happens when the motor stalls suddenly, but luckily it´s not always like that.

Rocking method should work as well, have not tried that myself.


that may be the case for some but when mine locks its a hard solid bind that is definitely like something in the kick/electric start binding - its done it since new - but only 3-6 times in 100-130 hours




 
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