help. im so lost i dont know what jets to get for my 400ex!!! - ATVConnection.com ATV Enthusiast Community



Performance Mods and Project Quads Share and ask for information about modifying your ATV or building project quads.

Reply
 
Thread Tools Search this Thread
  #1  
Old 07-01-2016, 02:49 AM
Weekend Warrior
Thread Starter
 
Join Date: Jul 2016
Posts: 3
Unhappy help. im so lost i dont know what jets to get for my 400ex!!!

i have a complete yoshimura rs-2 exhaust and a k&n air fiter for my 03 400ex but i have no clue what jets to get! ive never done jetting before so i would prefer to get a kit. the problem is i dont know which kit, and which stage i should get. also alot of the jet kits are not coming with pilot jets. i am so lost and i really need help. please give me some advice on what jets to get and or what stage jet kit to get. i dont know if this is the right forum section to post this question but i am kind of panicking as there is limited information on the internet about this. links would be great. thanks for any help, i really need it!


Reply With Quote
  #2  
Old 07-02-2016, 06:53 PM
nachop's Avatar
Range Rover
 
Join Date: Nov 2013
Posts: 186
Default

Do not purchase a kit. Buy several OEM (most likely Keihin for your quad) jet sizes from Rocky Mountain ATV/MC or other ATV/MC site. If you contact Yoshimura and give them your setup, and location, they will be able to give you a ball park figure. Once they give you an idea, I would buy about 4 to 5 main jets in 2 sizes larger increments and maybe even 1 jet two sizes smaller even though the chances of you needing a leaner main jet from what they recommend are slim. It is usually not a 1 step process, which is why you need several jets. As you probably know, it is best to have it a little on the rich side.
Reply With Quote
  #3  
Old 07-02-2016, 07:02 PM
Weekend Warrior
Thread Starter
 
Join Date: Jul 2016
Posts: 3
Default

oh ok awesome. i actually asked yoshi what i should get and they said to call dynojet and ask them what to get so im actually about to do that now. another person told me that they just get their jets from the honda dealership over the phone, do you recommend that??? also should i get pilot jets to?
what about ordering from this site, i could not find the right jets on rockymountain
https://www.jetsrus.com/a_jet_kit_at..._1999-2008.htm
Reply With Quote
  #4  
Old 07-03-2016, 02:18 AM
nachop's Avatar
Range Rover
 
Join Date: Nov 2013
Posts: 186
Default

Yes, that website would be fine, and yes, you could also get them from the Honda dealership, but I have found that RM ATV is typically cheaper. There are some parts that OEM parts are just better than aftermarket part. Jets are among these. Hopefully someone with a similar setup that lives in your area will chime in to let you know what they are running. If you get the info from Dynojet, then you can cross-reference their jet sizes to Keihin jet sizes. Remember to get multiple jets and do plug reads until you are dialed in. As far as pilot jets, it would not hurt to have a spare and a size leaner and richer. You usually don't need to mess with the pilot jet since it is responsible for idle and a hair above that.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
400ex chain problem Chris.400 Honda 4 03-31-2016 08:17 AM
400ex blowby matt400ex00 Honda 4 03-28-2016 08:18 PM
400ex jetting questions Luke Sandiefer Sport Quads 2 02-22-2016 06:48 PM
Jetting after putting on new exhaust Mojave87 ATV Racing 2 12-26-1999 02:09 PM
Jetting My 400EX sics Performance Mods and Project Quads 2 07-19-1999 11:35 PM



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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 01:25 PM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: