Big Bear 400 wont stay running - Yamaha Grizzly ATV Forum
Yamaha Big Bear/Bruin/Wolverine ATV Discussion Discuss your Big Bear/Bruin/Wolverine ATV here.

LinkBack Thread Tools Display Modes
post #1 of 2 Old 10-29-2011, 06:19 PM Thread Starter
Join Date: Oct 2011
Location: Houston, Texas
Age: 50
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Big Bear 400 wont stay running

I just got a BB 400, 2009, it only has 400 miles on it. Guy I bought it from never rode it. It starts fine, but wont stay running. Once under throttle, it runs great. Idle is better after warm up, but still wont stay running.

I am fairly mechanical, rebuilding an old Corvette right now, but have never messed around with bike carbs. Any input would be greatly appreciated.

khubert is offline  
Sponsored Links
post #2 of 2 Old 10-29-2011, 10:04 PM
laabsdan's Avatar
Join Date: Sep 2011
Location: Upper Michigan
Age: 38
Posts: 1,423
Thanks: 843
Thanked 279 Times in 234 Posts
Rep Power: 73
Check the idle screw and air filter to start. I did own the same bike and also an 2001 BB and they are very very cold blooded! Make sure the carb isn't gummed up if it sat with ethanol and no stabil. I run only ethanol free premium in mine.

2015 Can-Am Commander 1000 Max XT,1/2 Shield,Aluiminum Laterial Skids,All the XT Goodies Sold:2015 Yamaha Viking VI, Half shield,4500 Super winch, Soft Top, Sedona Syder 27" wheels, Ripsaw tires.
2006 Yamaha Vector Mnt 973cc
laabsdan is offline  

  Lower Navigation
Go Back   Yamaha Grizzly ATV Forum > Other Yamaha Forums > Yamaha Big Bear/Bruin/Wolverine ATV Discussion

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
wont stay running 660 grizz 02 deer357 Grizzly Engine & Transmission 3 05-24-2011 09:45 PM
wont stay running 561GRIZZ660 Grizzly Talk 8 04-08-2011 03:50 PM
600 wont stay in gear bayougrizz00 Grizzly Engine & Transmission 1 02-25-2010 08:23 AM
07 Grizz does not stay running wizerabbit Grizzly Talk 2 10-29-2008 09:36 AM
Grizz 700 won't stay running! Tech68 Grizzly Electrical & Lighting 3 06-30-2008 05:23 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome