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.

06kfx440

99 Polaris Xplorer 400. Vapor lock?

Recommended Posts

So I’ve rebuilt this quad and the only issue is fuel delivery. The filter fills up then runs out of fuel then dies. I’m thinking that vapor lock is the cause. And here’s my reasoning. The fuel lines are supposed to be 3/8 are 5/16 on there and it looks to have a huge filter on there. I did blow out all the lines and checked the petcock as well as the screens in the tank. Sonic cleaned the carb and replaced all the jets and needle. Blew out the vent lines too. Any one else have thought?

 

 

Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites


It’s possible about the fuel line thickness but I don’t think it’s likely.  I would remove the fuel filter and run a direct line to the carb without the filter. Just to see how it runs.   The filter is directional so it should go on the line on the right direction, have you checked that also ?

Share this post


Link to post
Share on other sites

Yes. When I was shooting air thru it it’s clear all the way to the carb. The carb is clear also. I took the cap off the tank just to rule that out too


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

I would pull the gas line off and replace with a direct line from tank to the carb w out the filter.  See what it does.   

It’s good to see you back on the forum brother ! @06kfx440 hope your feeling well.  

Share this post


Link to post
Share on other sites

It’s the same thing that happens with the filter. Runs great then dies. Ill show you guys what I’m talking about in a few minutes.

It’s awesome to be back. The quads took up some time. I have something else I’m working on too that will be custom and awesome.


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites


It’s the same thing that happens with the filter. Runs great then dies. Ill show you guys what I’m talking about in a few minutes.

It’s awesome to be back. The quads took up some time. I have something else I’m working on too that will be custom and awesome.

I’ve been doing okay. Got a lot things under control. I’m coming out to L.I.C next week. Have a few things to do down there. Let’s meet up and have a beer.


Sent from my iPhone using Tapatalk




Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

I love finding new things that break. Lol. The magnets on the flywheel came off. But it’s a simple fix. Gorilla glue and clamps


Sent from my iPhone using Tapatalk

Share this post


Link to post
Share on other sites

Yeah. Smaller lines and filter fixed it. But now it’s a ping at low idle and goes away when you rev it. It’s all new besides the dome. I don’t suspect piston slap. Give me a text frank. New phone.


Sent from my iPhone using Tapatalk

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 Squirrel
      Several months ago, I finally got around to fixing the bayou. Rebuilt the carb, replaced the fuel selector switch, hoses and fuel filter, and she ran great. Only had 2 minor issues since then where, at higher speeds, it acted like it was choking out when I let off the throttle.
      Lately I've noticed if I let it go for more than a week, it almost drains the battery dead trying to start. I initially thought battery, but after inspecting I found very little if not any fuel flow through the line until it starts and runs.
      I'm a little baffled and don't have much time to mess with it as most my free time right now is spent on getting my rv up and ready for hunting season in the next 3 weeks. So any help on quick diagnosis checks would be helpful. Otherwise I'll just keep starting it every 3-4 days to keep things primed until I'm done hunting.
       
      Oh, and another question on a different topic. Does anybody know what the mounting brackets on the front rack are for? I'm referring to the 2 angled metal tabs with threaded holes that are located on the left, near your knee when sitting on the quad?
       
      Sent from my SM-G950U using Tapatalk
       
       
    • By Dra O
      posted a while back - it was running at one point - I have all the plastic shroud off - it's down to frame and engine now
      -fuel pump: when line from petcock is attached, no fuel comes out other side to carb; the line to the carb is open (can blow through it); I thought when I cranked engine that the pump would spit out fuel on other side but it does not; I removed fuel pump and opened it up - diaphragm looks good - but internal areas had lotsa calcification build up - I cleaned this out and dried it good - the clear plastic pieces (?diaphragms) aren't broken - the spring w/ steel ball on end moves freely; am putting it back on tomorrow; but can anyone answer about the pump? isn't it supposed to pump fuel through it... to other side... to carb? puzzling
      -along with fuel pump: I replaced petcock 3 weeks ago (gas tank had rusty fuel in bottom - cleaned it out prior to new petcock); when I turn petcock arrow NOT to on or reserve, fuel comes out of line; when I turn it to on or reserve, fuel doesn't come out; puzzling
      -I don't know what's on back of fuel pump - it's a valve that has a hose coming out of it - looks like it goes to engine/carb - I haven't traced this out yet - what is it?
      -can squirt gas on air filter and engine will run for 2-3 seconds then stop - fuel in top of carb (under diaphragm) does same
      -it likely needs carb rebuild - will get to this - but something isn't allowing fuel to get from fuel pump to carb
      -I THINK it has a mikuni model x carb - diaphragm is ID 26mm  OD 68mm - hard to find inexpensive diaphragm, I guess because it's a model x
      -last thing - I replaced solenoid due to old one clicking; I HAVE to be charging the battery or it won't start/turn over - battery just goes dead; but if charging, it'll turn over nicely; i'm guessing it's a bad battery
      -any help appreciated - I've never owned an ATV before - inherited this beast from grandparent in-law
    • By lanow
      Hi Everyone,
      I am new to this forum and hope that someone out there can help me, I have an early Suzuki King Quad 300 (280cc) which starts intstantly every time but at about half revs or there abouts it starts spluttering and will not rev any higher, this fault is present whether choke is applied or not, some one suggested that silencer maybe be clogged so removed baffle but no improvement have removed carb and stripped 3 times but still no joy.
      Any ideas would be most welcome.
      Cheers Rob
    • By StolenATV
      1987 Suzuki LT 80 and 2007 Honda CRF 50 dirt bike stolen out of my driveway on July 4th. Anyone with info that recovers them will get $400 no questions asked.
      Thanks
      The post Suzuki LT 80 Quad And Honda Dirt Bike appeared first on STOLEN 911.
      View the full article
    • By ATVNetwork
      When it comes to adding more power to your ATV, the first thing that usually comes to mind is bolting on a slip-on exhaust. However, that usually means you are also bolting on a lot more noise. HMF do...
      More...
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...