Hey everyone - Yamaha Raptor Forum
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 03-27-2015, 06:56 PM Thread Starter
Junior Member
Join Date: Mar 2015
Posts: 17
Hey everyone

I have been around reading the forums here for a few weeks now so I figured I would make an account and join the action.. I bought a 01 660 about a year ago non running no intake no seat plastics busted all up so I put it back together but it backfires and falls on its face about 3/4 throttle .. I tried everything jets valve adjustment finally gave up and just rode it that way all last year. Well I broke it out a few weeks ago and rode decided the problem had to be in the carbs so I pulled them only to find my choke wad stuck this whole time. Ordered the parts waiting for them to come in hopefully that cures it but was just wondering where I should be jetting wise I'm in grand junction colorado right at 5000 feet. The motor is stock from what I can tell I'm running a k n air filter with a cut box so intake is modified I just want to make sure I'm at least close with the carbs before I rule them out if it's still doing it. Any help is greatly appreciated
Unpuritan is offline  
Sponsored Links
post #2 of 5 (permalink) Old 03-27-2015, 07:25 PM Thread Starter
Junior Member
Join Date: Mar 2015
Posts: 17
No lid also on the air box either
Unpuritan is offline  
post #3 of 5 (permalink) Old 03-28-2015, 07:04 AM
Senior Member
Join Date: Jun 2012
Location: Shenandoah Valley of Virginia
Posts: 3,459
aftermarket needles, 25 pilot jets, and at least 155-160 mains, being that high of altitude u may not need to run the 160-165 mains(staggered, the right carb runs a size bigger jet)
badlukrappy is offline  
post #4 of 5 (permalink) Old 03-30-2015, 10:41 AM
Master of the Electron

QuadManiac's Avatar
Join Date: Apr 2007
Location: San Diego, CA
Posts: 14,417
Originally Posted by Unpuritan View Post
No lid also on the air box either
At 5000 ft I'd just try larger mains... 150L 155R to start.

'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'04 Suzuki LTZ400
'16 RZR XP4 1000 Turbo

Last edited by QuadManiac; 03-30-2015 at 10:43 AM.
QuadManiac is offline  
post #5 of 5 (permalink) Old 04-07-2015, 10:15 AM Thread Starter
Junior Member
Join Date: Mar 2015
Posts: 17
Ok got her back together and it's a world better but still not right at full throttle its got a hesitation now just a slight hiccup as it enters the upper rpms I'm thinking it's got to be needles what position is what on them aka do I need to go up or down with them
Unpuritan is offline  

Quick Reply

Register Now

In order to be able to post messages on the Yamaha Raptor Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


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
Hey Hey! (everyone still alive?) SIC Off-Topic Lounge 4 06-08-2009 05:03 PM
Hey Hey lokie what I gots!!!!!!!!!!!!!!! Humboldt_G Raptor 700 Discussion 22 06-02-2008 02:00 AM
hey everyone lillusk3 Raptor 700 Discussion 8 12-28-2007 09:50 PM
hey everyone. a new set of duals has hit the market!!! check them out. monste donoair Raptor 700 Modifications 129 04-17-2007 10:45 PM

Posting Rules  
You may post new threads
You may 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