2008 YZ450f suddenly dies

Brand Yamaha Yamaha YZ450F 2008

4 replies to this topic
  • MotoFixation

Posted October 12, 2015 - 11:50 AM

#1

My 2008 YZ450 starts first kick from cold and ill let it run for 45ish seconds than it dies outta nowhere. I turned up the idle and that did not seem to help. It has very few hours on it like maybe 30 to 50 hours (never rebuilt). Im thinking it may be the fuel screw just have not got around to messing with it much. Any thoughts?


Edited by MOTOFIXATION, October 12, 2015 - 11:50 AM.


  • Krannie McKranface

Posted October 12, 2015 - 02:27 PM

#2

Adjust fuel screw for highest idle

Do valve clearances adjustment

Buy a service manual and start reading up on how to maintain the bike per Yamaha's recommendations



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

Posted October 12, 2015 - 05:02 PM

#3

If your taking it off the choke and its stalling buy a new pilot jet put it in and give it a whirl.



  • grayracer513

Posted October 13, 2015 - 06:59 AM

#4

Try the fuel screw first to see if the pilot jet is in the right range:

 

Adjustment procedure

 

Use the fuel screw to check jet size

 

If it turns out that these checks indicate a too small pilot, you should either try cleaning the jet or replacing it.  A #43 to #45 should be about right.  If you have that size in place already, yours is likely partly clogged. 



  • MotoFixation

Posted October 13, 2015 - 11:44 AM

#5

Thanks guys 


Edited by MOTOFIXATION, October 13, 2015 - 11:45 AM.






Related Content

Forums
Photo

12-14MPH and Spotters like no gas by 07DRZ4SM


Dirt Bike   Make / Model Specific   Suzuki   DR-Z 400
  • Hot  33 replies
Forums
Photo

2 Stroke Maintenance? by Yammerjammer93


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • * * * * *
  • 10 replies
Reviews

Yamaha WR stator & Rotor by NWsurfkid


Electrical Lighting Stator Systems Yamaha WR stator & Rotor, Brand Yamaha
  • * * * * *
  • 1 review
  • Last review by NWsurfkid
  • On November 27, 2016
Reviews

Yamaha OEM WR250X Plastic Fork Protector (Left) (Black) by Adrenolin


Body Bodywork Yamaha OEM WR250X Plastic Fork Protector (Left) (Black), Brand Yamaha
  • * * * * *
  • 1 review
  • Last review by Adrenolin
  • On January 07, 2017
Forums
Photo

Help me decide on what bike to get! by SuperjetEnthusiast


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • 10 replies
 
x

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.