Quantcast
Jump to content


YFZ Carb Problems??

monsterZ914

By monsterZ914
in Yamaha ATV Forum

 Share

Recommended Posts

monsterZ914 Rookie

monsterZ914

Posted
Posted

I believe that My 07 YFZ is has a throttle that is sticking open. The only problem that i have with it is that it holds a high idle right after you hit the throttle. I looked the cable over and took off the cover on the carb to see and ensure that it is not the cable.With it running i used my finger to move the throttle. it idled high. i tried pushing the throttle closed didnt do anything.

Is there an adjustment that is off.

The shop Replaced the orignal carb with a new due to a problem. i don't know what that problem was. Yes they should fix this. but it was like 2 years ago and i dont think they will do it for free

Anyone have any ideas?

Link to comment
Share on other sites
monsterZ914 Rookie

monsterZ914

Posted
  • Author
Posted

where is the Fuel/air mixture screw? what is the approx. setting? with stock jet?

I dont know about the cable being replaced but it seems good. but i did order a new one. regardless

I removed the air box and noticed that there was oil from the filter in the tube to the carb so maybe there is that. sticking the carb up. so Im going to run cleaner through it tomorrow.

Link to comment
Share on other sites
DirtDemon Veteran

DirtDemon

Posted
Posted

First check the idle screw and make sure the cable adjustments(top of the carb and at the other end of the cable) are not holding the throttle open. If that doesn't work, take the carb off, leave the cable connected and look inside while you work the throttle in and out. Make sure that the slide closes all the way. If it has sat for a long while, then I would suggest cleaning the carb, some of the fuel could have gummed up partially blocking the jets, this would cause a lean condition and cause the machine to idle high. If that is the case, you need to fix it, lean is very bad.

Link to comment
Share on other sites
Irideyamahaandhonda Contributor

Irideyamahaandhonda

Posted
Posted

Has it done this since they put the new carb on? If none of the other ideas work for you get your service manual out and check to make sure the slide is in right (the slide is what is normally referred to as a butterfly on a older auto carb). I put mine together in a hurry after re-jetting once and I had one of the plates on my slide facing the wrong direction and it had the same symptoms

Link to comment
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.

×
 Share
Go to topic listing

  • Similar Forum Topics

    • semicolon
      TRX350D fuel pump problem
      By semicolon
      Hi, I am having issues with my TRX350D fuel pump.  It suddenly stopped running so I have replaced all the fuses and cleaned all the terminals.  I have fitted a new pump, fuel cut-off relay and rectifier.  Still nothing!!  The pump runs when attached to a battery.  The engine will start on the choke and the filter fills with fuel but it will  not rev and dies when the choke is closed. I have power to the relay but nothing at the pump black/white wire when cranking the engine.  Any ideas where to go from here would be very much appreciated!!
       
    • mehim
      In search of the backwoods nudist campsites and ready to select the right ATV.
      By mehim
      Hi everyone. 
      Let me explain the thread title. 
      My husband and I are very active in the nudist community, and we have stayed at many and most of the mainstream nudist and clothing optional campgrounds in the USA. We are now approaching our retirement and would like to start a podcast to share those off the road / backwoods / little known camping areas where nudity is allowed. We have purchased a 5th wheel camping trailer with a rear garage for the ATV and now need some good reports on the one to buy. 
      We are most interested in a side by side unit but would love to get your thoughts. 
      Feel free to stop by and say Hi and ask anything you would like to better understand what we are looking for in an offroad unit. 
      Thanks for reading and hope to hear from you. 

    • N00bie
      2012 John Deere Gator 850i RSX Idle Problem
      By N00bie
      From Arkansas. Just bought a 2012 Gator 850i RSX because I could not pass up the price. BUT it has an idle problem. So, to be honest, I joined just to get a service manual. I have a choice: 1)Buy a hard copy: ~$100; 2)Buy a CD ~$35.00; Get a direct download for free posting 10 times; or get a download for $29.00 (subscription). Haven't decided what to do yet.
    • ResQ91
      Help with 1987 Yamaha Big Bear YFM350FWT Carb
      By ResQ91
      Hi Guys!

      New member and could really use your advice. I would have to believe this has been an issue for others but a search here came up with nothing......? (Probably me not doing search correctly)
       
      I have an 87 Big Bear 350 YFM350FWT
      The OEM Mikuni BTM carb is shot and would rather replace than rebuild.
      It is no longer made and I have had good luck with NICHE carbs so I ordered a #K-CRB-0006 This was what they said was replacement when ordered. This Carb only uses 1 Throttle cable. The Slide is linked so it uses one. (OEM had 2nd cable coming through top to move slide)
       
      Problem is when I ordered a replacement Cable from NICHE (#C-CBL-0061) the Cable wire is a little short, not allowing Throttle to return all the way down to Idle position. I called NICHE and they are at a loss. Haven't gotten back to me after 2+ weeks.
       
      What would you recommend other than a carb rebuild?
      Can I just use 1 of the OEM cables (It is the right length) and snip/disconnect the other that went to top of Carb for Slide?
      Or ??
       
      Thanks in advance for any advice you have!!
       
      Dave
    • skittle021
      Super Weird Problem with Primary Sheave/Clutch... (Hisun 550)
      By skittle021
      So I've got a Hisun 550 that I was doing some work on that required removing the CVT and it's housing. Upon attempting to reinstall the clutch, sheaves, etc, I found that the belt no longer fits - it's far too wide. None of the parts have been replaced, they're all OEM. Exactly the same parts as what I took off a few weeks ago.
      To be more specific, my belt is 1.25in wide, but the gap between the clutch and the primary sheave is only 7/8in wide. I'll include a few photos to explain.
      Has anyone ever experienced such a bizarre problem? Any help at all would be appreciated, I've been stuck on this for a month. I'm open to just about any suggestion.
      Photos: 
       





COMMUNITY SECTIONS

ATV FORUMS

QUADCRAZY MEMBERSHIP

Be a part of best online community of ATV riders and join thousands of people who love ATVs! Share your ATV photos, videos, ATV rides, get help with your ATV and more. Not a member?

SIGN UP TODAY

ADVERTISE WITH US

FOLLOW US ON

  • Automotive Webmaster
×
×
  • Create New...