Go Back   ATVConnection.com ATV Enthusiast Community » Brand Discussions Area » Yamaha
Sign in using an external account
Register Forgot Password?
Search

Welcome to ATVConnection Forums!
Welcome to ATVConnection.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the ATVConnection Forums community today!


Reply
  #1  
Old 02-20-2005, 11:13 PM
Pro Rider
Garage is empty, add now
 
Join Date: Aug 2004
Posts: 385
Default Raptor air/fuel mixture screws

Does anyone know what the stock setting for the air/fuel mixture screws on an 05 Raptor 660? I need to know how many turns out they should be from bottomed.
Also, Does anyone here run a Yoshimura pipe? If so, did you have to change your air/fuel mixture settings.
Thanks.
Reply With Quote
  #2  
Old 02-20-2005, 11:17 PM
Pro Rider
Garage is empty, add now
 
Join Date: Aug 2003
Posts: 1,198
Send a message via AIM to Rider1169
Default Raptor air/fuel mixture screws

i beleive in most cases stock is 140/145, and 2 1/2 turns out on th e air/fuel mixture screw. if its not 140/145, its 145/150.
Reply With Quote
  #3  
Old 02-20-2005, 11:17 PM
Elite Pro Rider
Garage is empty, add now
 
Join Date: Sep 2002
Posts: 9,381
Default Raptor air/fuel mixture screws

If your dealer set the bike up for you then they should have tweaked the a/f screws for your temp and elevation. But most dealers dont do this to my knowledge.

The stock settings are supposed to be 2/2.5 turns out. Depending on your bike setup and environment along with what jetting and pilots you install it will affect the necessary screw settings.
Reply With Quote
  #4  
Old 02-20-2005, 11:25 PM
Pro Rider
Garage is empty, add now
 
Join Date: Aug 2004
Posts: 385
Default Raptor air/fuel mixture screws

With a powerlid and Yosh exhaust, would the screws have to be turned in, or out? After putting the pipe on, my friend changed the jets out to 150/155. With them at 1.5 turns, it starts popping at 2000rpms and the pipe gets red hot near the head.
Thanks.
Reply With Quote
  #5  
Old 02-20-2005, 11:36 PM
Pro Rider
Garage is empty, add now
 
Join Date: May 2004
Posts: 2,689
Send a message via AIM to 86LT250RFatty
Default Raptor air/fuel mixture screws

whoa! 1.5 way to little, make them 3 FULL turns out, and with the powerlid, you might want to go up to 155/160
Reply With Quote
  #6  
Old 10-08-2010, 10:55 PM
Weekend Warrior
Garage is empty, add now
 
Join Date: Oct 2010
Posts: 1
Default

now when you guys say 2 1/2 turns out on the fuel screw on stock setup.... is that two full 360 degree turns followed by one 180 degree turn? or two 180 degree turns followed by one 60 degree turn?

Someone please respond ASAP i need to get my raptor going ASAP.

what happend was i went for about a 30 minute drive and it ran great just after about 20 minutes of riding up and down hills over and over i was on a hill for about 20 minutes just riding on it and it started to idle really low almost like it wanted to shut down i revved it and it started to back fire and when i got home it got worse so im thinking the elevation screw up the fuel srew or something, any suggestions?
Reply With Quote
Old 10-08-2010, 10:55 PM
Reply

Tags
05, 250, 660, 660r, adjustment, air, fuel, fuelair, micture, mixture, raptor, screw, screws, setting, stock



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