400ex jetting - ATVConnection.com ATV Enthusiast Community


Go Back   ATVConnection.com ATV Enthusiast Community > Brand Discussions Area > Honda
Search

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 08-30-2009, 09:36 PM
Weekend Warrior
 
Join Date: Mar 2009
Posts: 7
Default 400ex jetting

I have a few mods on my 400ex...440 big bore,stage 2 hot cam,HMF exhaust. I am sure its running lean. Jet in it is a 152 and I know it will take larger. Any suggestions on where to start as for jetting larger and possible kit to look for??? Thanks
Reply With Quote
  #2  
Old 08-31-2009, 08:07 AM
Pro Rider
 
Join Date: Aug 2008
Location: illinois
Posts: 252
Default

what kind of jet are you running ? i have a 07 400ex with ehs airbox lid twin air filter and carb spacer & hmf slippie. i run 170 dyno jet. i am 565 above sea level.
Reply With Quote
  #3  
Old 08-31-2009, 09:41 AM
Koopa's Avatar
Pro Rider
Is addicted to 4 wheel'n!
 
Join Date: Apr 2007
Location: Chickasha, OK
Posts: 1,806
Default

152?!?!?! Ya, way lean I wouldn't ride it much with a 152. It's not getting enough fuel to take advantage of your mods. Start with 170 if you run with lid off. Maybe 160 with lid on. And I'd just get single jets, mucho cheaper than a kit.
__________________
2004 YFZ450
Barker Full exhaust
Dinged Rim
Scratched Plastics
Custom blood stains
Now with cam mod!
Reply With Quote
  #4  
Old 08-31-2009, 09:16 PM
Pro Rider
 
Join Date: Aug 2008
Location: illinois
Posts: 252
Default

Quote:
Originally Posted by Koopa View Post
152?!?!?! Ya, way lean I wouldn't ride it much with a 152. It's not getting enough fuel to take advantage of your mods. Start with 170 if you run with lid off. Maybe 160 with lid on. And I'd just get single jets, mucho cheaper than a kit.
it is cheaper to buy single jets but if you have a 05 or up dyno jet gives you a tool for the fuel mixture screw.
Reply With Quote
  #5  
Old 09-01-2009, 08:09 AM
Koopa's Avatar
Pro Rider
Is addicted to 4 wheel'n!
 
Join Date: Apr 2007
Location: Chickasha, OK
Posts: 1,806
Default

You can call dynojet and they will let you order just the mixture screw if you need it.
__________________
2004 YFZ450
Barker Full exhaust
Dinged Rim
Scratched Plastics
Custom blood stains
Now with cam mod!
Reply With Quote
  #6  
Old 09-02-2009, 06:35 PM
Weekend Warrior
 
Join Date: Mar 2009
Posts: 7
Default Remedies/2001- 400ex

I will definitely give that info a go. Thanks, I will post the results after I do the mods and give it a run.
Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
Prairie 360 electrical problem ... I think ReconBayou Kawasaki 9 09-26-2015 09:29 AM
Tires!!! XxS0ccerstarxX Honda 0 09-24-2015 11:53 PM
Decisions decisions!!! XxS0ccerstarxX Polaris 1 09-24-2015 05:38 PM
Need to know what to do!! XxS0ccerstarxX Honda 4 09-24-2015 02:02 PM
Stressing out help XxS0ccerstarxX Honda 2 09-22-2015 02:40 PM


Tags
170, 400ex, air, big, bore, box, dynojet, jet, jets, jetting, kit, lid, mods, screw, stage


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 08:30 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company