Quantcast
Jump to content

  • Join Today, It's Simple and FREE!

    As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery.  Registration is fast and you can even login with social network accounts to sync your profiles and content.

Recommended Posts

Can someone please tell me where the pilot air jet is located? I can't find anything other than on the pilot jet. It's on a 2005 yfz 450. 

Share this post


Link to post
Share on other sites


There is no pilot air jet.   The only jets are the main jet, pilot jet and  a choke jet on some carburetors.

Do you mean air fuel mixture screw ? 

E51569A7-189B-462D-BB1A-885C8873BA52.jpeg

06990A31-89D0-481B-BEBF-870F1AA7A5C2.jpeg

Share this post


Link to post
Share on other sites

I see it’s listed as that. Some carburetors show  it as a starter jet. It should be the one that’s pointed out in the pic. It’s that small alcove off of the plastic rim. 

98BAE750-5DB8-4E0B-BDFB-CA4210F8B37E.jpeg

Share this post


Link to post
Share on other sites

The one with the arrow is your main jet; #1 in illustration. The kit came with all jets needed. I've installed 5 of the 6. Just can't find pilot air jet. 

Share this post


Link to post
Share on other sites


I have to say this was a good post today @Brad Leeson. I’ve over looked this jet from day one!  I’ve never knew about this jet. I thought that the jet you were looking for was that small one next to the main jet.  

 

Share this post


Link to post
Share on other sites

I almost over looked the accelarator jet located in the float bowl top also. I had to take the thing back apart to actually find it. There is a million damn pieces to this little baby. I picked the wrong one to tackle being my first every rebuild. 

Share this post


Link to post
Share on other sites

Pilot air  jests are easy to  miss.  Some carbs hide their  idle mix  jets  under a seal so  most people  using them  don't  mess with the mix.  Those can present  real  head scratchers for those that need to  clean and adjust them .  When  in doubt, it's always best to do a search on what you want to  work  on ..  We  can  help in forums like this one, but unless one has actually dealt with a specific problem on a machine they own  all  most of us can offer  is general  information and  "best guesses"

  • Like 1

Share this post


Link to post
Share on other sites


Man I've been searching, reading, YouTube, and a few other things for 3 days now. I knew the jet was somewhere because every kit came with it. It took me a few hours to figure out what people meant when they said leak jet. I really appreciate you taking the time out to help me and so polite and understanding with a newbie. 

Share this post


Link to post
Share on other sites

That’s the thing with Quadcrazy!  When I first found this site I was borderline loosing my mind about a problem I was having on one of my bikes.  I consider myself a good mechanic and figuring problems out is not a big deal for the most part.  Over the years I’ve gotten so much better but continue to learn every day.  But shit like this comes up and really makes me reset and go back to basics. 

Actually it was @davefrombc that pointed me in the direction of my problem I was having on that one particular bike and wound up being exactly that!

So big shout out to Quadcrazy and the member base including @Ajmboy and @Admin and let’s keep paying it forward! 

  • Like 1

Share this post


Link to post
Share on other sites

@Frank Angerano thanks for the mention! It’s all you guys that day in and day out help members out in their topics. I learn more reading your replies and love to see a problem solved!

  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Similar Topics

    • By Mike Iadonixi
      Hi my son's 2005 Honda recon engine is seized any ideas on what or where to get another engine 
      Thanks to you guys i fixed my other son's four wheeler last month
      any help would be greatly appreciated
      Thanks
      Mike
    • By Wayne Starz
      I have a 2005 Suzuki Vinson 500cc automatic 4X4. I can only shift it in to park & High gear, it will not go in low or reverse, what's the issue & the fix?
    • By Seymore
      I made my intro about a QuadRunner I was working on and found a multitude of problems. Most I fixed, but I'm thinking that I'll be making more trips to see the 90' LT-250/4WD. Age and needing regular attention is the reason. The owner, NOT being mechanically inclined, adds into the equation.
      So, I deliver it and was offered, as payment, a 95' LT-250/4WD, with paper. It didn't run and had been sitting outside for last 12+ months. It was (basically) all there. This happened Saturday and this "Barn Find" came home to live out it's final years (I suspect).

       
      Today I finally found time to look at her. Not a pretty sight. Rough life, many hrs....... MANY! Only 2399mi, but the speedo is disco'd. I just want to know if this will be worth pursuing. First things first, a really good cleaning. I hate working on dirty vehicles.

      The battery actually took and held a charge! The carb was pulled, cleaned and the tank drained. Found a broken orange wire, dangling loose, near the carb. It was hot when the key was on and ended up connecting to a 10A fuse block. Well, I wonder why it didn't run???? Hmmmmmmmmmmmmm! 
      Carb back on, fresh non-eth fuel, had to remove the air filter for this test (needs replacement), sprayed a little ether..... hit the starter, fired and died. Third time's a charm, she runs. I'll be going thru things as I can and questions will follow, in this thread.
       
      WOOHOO!!!
    • By LMI
      I wanted to share an experience and a fix.
      Headed out was following a pole line, was looking for a cross track that may take me to this speckle trout looking spot on a creek.  All paths and semi paths... failed.  Second objective was to reach a speckle trout lake that has been recently stocked... followed 1 trail to dead end, followed second trail to dead end.... while investigating options on foot and the quad idling it died.
       
      It wouldn't start.  eventually it did... and when it did … it was essentially a pinned idle.  activating the throttle did seem to speed it up but it wouldn't knock out of the racing idle.  couldn't put it in gear at that idle speed.  got towed out.
      when I first got the quad, I ran it off a trail and buried it pretty good in the soft snow... eventually winched out.  It wouldn't start.  eventually did and it was fast idling.  not as fast as this last time. but still fast.  it eventually seemed to settle and I got it in gear and by the time I was back to the truck was acting ok.  chalked it up to the bike being at a bad angle in the snow.
      My investigation last year lead to the throttle position sensor TPS.  how to jumper the diag block to see the sensor position on the display,.  I focused on this nearly sure it was a detuned sensor or broken sensor again this time.
       
      I tore down the front plastic and stuck my head into the TPS area to see what I could see.  What I found was that the throttle body assembly had actually come out of the mounting area (not sure what it is called).  the ring clamp was loose I could move it easily.  Hopeful, I tore down the air intake assembly above it (air filter...etc) removed a sensor clip and a hose.
      I backed off the clamp some more and was able to reseat the throttle body assembly.  put some blue lock tite on the clamp screw.  When I was cleaning off the air intake assembly to ensure I dropped nothing down the intake, I noticed the underside of the air intake "box" also had a clamp.  this screw was completely missing.
      I went to the hardware store, bought a metric replacement (brought clamp with me), seated the assembly, settled the clamp blue lock tite that as well... 
       
      quad fired right up, idled normal, idled up without hesitation and dropped right back off.  Cost of solution $3.87 CND for a pack of 5 metric screws.  moral of my story was don't assume an idle issue is a throttle position sensor problem... there are a number of other factors including air pressure, which I believe was my issue.
       
       
       
    • By Brian Simmons
      Yes I am looking at buying a 2005 Suzuki ltz400. The guy said when he goes through a puddle or water it shuts off !!! I know it’s electrical . Does anyone have any ideas what the problem could be??? Let me know ASAP ??? I want to know if I should buy this atv ???
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...