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.

Wonderwoman

2003 manual shift 250 smoking issues

Recommended Posts

I am about at my wits end. Took the 250 back to the dealer repair shop AGAIN. Had it in there two months ago for a bad smoking issue. I thought it was to much fuel and washing the oil off the cylinder and burning it. They said it was the head. So I purchased new valves, valve guides, oil seals and had the head professionally done. So $225 later I had a great looking head. Well while I had the ATV apart this far I also got new rings for the piston. Mic'd everything out and everything was in spec. Put it back together and seemed like it smoked a little at the house (5000 feet above sea level). Took it to the mountains (9000 feet above seal level) for Sept. bear hunting and couldn't use it. Smoked worse than before and couldn't run it past half throttle or it would flood itself out. So brought it back home and it is back at the shop again. I say it is something in the carb that isn't set right or wrong jet????????? Anyone have any other ideas that it could be?

Share this post


Link to post
Share on other sites


is the smoke black or blue? black is gas and blue is oil, is it gas flooding or oil on the plug? was the cylinder in specs, even below the ring ridge line? did you hone it if it wasn't nickeled? is the crankcase vent line clear? just a few ideas

Share this post


Link to post
Share on other sites
is the smoke black or blue? black is gas and blue is oil, is it gas flooding or oil on the plug? was the cylinder in specs, even below the ring ridge line? did you hone it if it wasn't nickeled? is the crankcase vent line clear? just a few ideas

Smoke is blue, gas flooding is the symptom. Cylinder specd out great all the way. Cylinder walls were as smooth as can be and ran the hone down it one time. Never checked the crankcase vent line. Will do that. Found out that the jets are not correct. Dealer mechanic didn't think to check that until I said something. So we are going for correct jets and see what that does. I'll ask them to check the crankcase vent also. Thanks for your help.

Share this post


Link to post
Share on other sites
hate to say it but blue smoke is oil smoke,

You don't think the flooding of the carb could be washing the oil off the cylinder and burning it?????????////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Share this post


Link to post
Share on other sites


You don't think the flooding of the carb could be washing the oil off the cylinder and burning it?????????////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

Ok, got the right jets for the carb and adjusted the valves. Smoke is gone and running great. Final test will be taking it to the mountains this weekend and see how it runs up there.:biggrin:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Similar Content

    • By Chayse Hill
      I have a 2003 LTZ 400 that i bought a few days ago. The quad was running fine until last night. I let my brother ride it down the street and back and i didnt notice anything etong with bike. Then my neighbors friend came over and said "can i ride it?" I said "sure" so he ripped it down the road all fine and when he got back it died right in front of us. My brother said it was dieing on him also. He also said that he wasnt using the clutch to shift. I told him he was an idiot. Im throwing that in there incase that caused a problem as well. But today i go to check it to make sure its getting fuel which it is and replaced the spark plug incase it wasnt getting spark but it is. So i started it and it was having a problem starting then i got started and was reving at idle high. So i took it around the block and it died on me a little bit down, so i try to restart it and it started so i kicked it into 1st and it kinda launched on me and started going with the clutch all the way in. Then it died right after and wasnt running right during that process and was idleing all over the place and just died and now i cant get it started it again. Before it would start without the choke or priming it. It would start real quick now i cant figure if it needs to be rejetted or something else. Air filter looks clean also. But any help would be gratelly appreciated!
    • By Kyboy
      Iam looking for help seperating the rear brake drum and the cover. Any suggestions would be greatly appreciate
    • By alexcross324
      Hi all, I try to find this manual in the threads but you have a lot of stock here
      Cannot find this particular manual.
      I found it for YFM200 but not sure if they are the same.
      Thanks if you could help me with that.
      Im new here so if I did something wrong, please tell me.
    • By dyyjrr9
      I just got a 1991 Yamaha Moto 4 for my son and I am looking for a service repair manual. I know that the timing chain needs replaced.
    • By Jers
      I need to know what I have and what tire really go on it, Mine has 24x11x10 on the back and 22x8x10 on the front and I need new tire but I don't think are the right size. Also I can't find the model number listed but it looks like a 250 quadrunner 2wd and I think it is a 1987 maybe, can anyone help me, also I it has a rich running sound and I put a carb diap in it and cleaned the carb. is there a jet needing replaced?
  • Recently Browsing   0 members

    No registered users viewing this page.


×