Sometimes it just dies

12 replies to this topic
  • Luv2brap-downunder

Posted May 28, 2015 - 04:40 AM


Went for my first dirt ride today, and after a while it wouldn't idle, just die with no hesitation. And just two pops if I pulled up somewhere or pulled the clutch in, wouldn't start then Id give it a minute literally and then would start first kick- normally does. This happened twice in 5 minutes then I went back onto the road and was sweet.

08 wr450f 1850ks- I've had it for 250ks
Not sure if it's got ais
Air box would be stock I assume
Has been jetted (don't know what to)
Grey wire hasn't been touched
Took the baffle and pee shooter out before the ride

Any suggestions or starting point would be great!

  • Krannie McKranface

Posted May 28, 2015 - 04:48 AM


Time for a re-tune


You need to uncork and rejet, and while you are in there, service the entire carb.


There are tons of posts on the subject of jetting; read the FAQ section or search.


Follow this for carb service. Do it all:



  • Luv2brap-downunder

Posted May 28, 2015 - 05:05 AM


I'll have a geaze,cheers !
I wasn't riding her hard before mainly just putting around. It was like 15 degrees C Don't know the elevation

  • Krannie McKranface

Posted May 28, 2015 - 05:06 AM



  • Luv2brap-downunder

Posted May 28, 2015 - 05:20 AM


Throttle stop has been modded I was told, feels like my yz450 aswell

  • ThumpMe

Posted May 28, 2015 - 05:32 AM


+1. It does sound like you might have a little trash floating around in the carb that needs to be cleaned out.

How dirty is the air cleaner? Just curious as it sounds like you have not even looked into the air box yet. If it is real dirty, cause previous owner did not clean it often, it stands to reason carb could be dirty as well.

I once had a bike that would run till real hot and then it would stop for a few minutes like you mentioned. Turned out it had a bad CDI and when it got real hot it would quit till the box cooled down. USUALLY when they go that is it....but sometimes they can do weird stuff.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Luv2brap-downunder

Posted May 28, 2015 - 01:26 PM


Air cleaner is smik and air box is clean

  • Luv2brap-downunder

Posted May 30, 2015 - 05:34 PM


Ok so it happened again on the road, switched the tank tap to reserve and went like a champ, switched it back over to normal tank and cut out again, is their a filter in the tank ?

  • BlueBeast400

Posted May 31, 2015 - 11:34 AM


Time for a new and easy!

  • ThumpMe

Posted May 31, 2015 - 04:35 PM


Both the pick-ups for the mains and reserve have real fine screens on them to keep trash out of the carb.

You might try puling the petcock out of the tank, opening it up to on, blowing some compressed air backwards through it to see if it will clean out
any garbage that might be plugging it up and then going to reserve and doing it again.

I would also try to look into tank while you have it off and the petcock out and see if there is any junk floating around in it just to be sure it is clean too.

  • Luv2brap-downunder

Posted June 01, 2015 - 04:53 AM


Yeh got it under control now boys hahaha
It was clogged up!

  • SilvFx

Posted June 01, 2015 - 02:25 PM


Yeh got it under control now boys hahaha
It was clogged up!


being that you are from Australia, I figure it must have been some venomous snake or poisonous spider or something like that clogging the petcock, right?




  • Luv2brap-downunder

Posted June 01, 2015 - 11:52 PM


Yeh if you don't watch out, when refilling out in the bush little drop bears, drop into your tank :)


Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.