Quantcast
Jump to content

  • Do you own an ATV? Join our Forum!

    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.

Dennisg

1989 suzuki lt-250 4wd

Recommended Posts

I recently rebuilt the top end of the motor and rebuild of the carb. It was smoking real bad and hard to start. Now it starts right up and shoots out white smoke and oil out of the tailpipe. It also idles fast with no adjustment on the idle screw . What can be my problem?

Thanks

dennisg

Share this post


Link to post
Share on other sites


I had the piston replaced and the cylinder fitted to a new one and the head finished by a service shop and

I bought a carb rebuild kit from e-bay and cleaned it and put it all back together.

Vacum? Which hoses would that be?

Thanks Dennisg

Share this post


Link to post
Share on other sites
I had the piston replaced and the cylinder fitted to a new one and the head finished by a service shop and

I bought a carb rebuild kit from e-bay and cleaned it and put it all back together.

Vacum? Which hoses would that be?

Thanks Dennisg

check your boots on the carb:yes: check your head pipe connection to the head Check your carb again ! Blowing white smoke ? check your head gasket JMO

Share this post


Link to post
Share on other sites


I have checked the head and the pipe and it is tight with no leaks. The carb boots , it seems that it does not make any difference weather the boot is connected or not, just runs fast at idle with no adjustment. I assume that you are talking about the boot that goes to the airbox.

Thanks

dennisg

Share this post


Link to post
Share on other sites
I have checked the head and the pipe and it is tight with no leaks. The carb boots , it seems that it does not make any difference weather the boot is connected or not, just runs fast at idle with no adjustment. I assume that you are talking about the boot that goes to the airbox.

Thanks

dennisg

No I was thinkin the one that connecets the carb to the motor If you checked all that stuff then I would go back in to the carb The white smoke is puzzling to me !! Dou have any pics of the quad ?

Share this post


Link to post
Share on other sites
Isnt white smoke usually coolant? Dont know if car physics apply here

Sent from my SGH-T959V using Tapatalk

Caused by a blown head gasket most of the time !!

Share this post


Link to post
Share on other sites

I thought that I may have overfilled the oil, so I let some out and then ran the engine for a few minutes. Oil and white smoke still shooting out and still idling too fast. Any Ideas?

Thanks

Dennisg

Share this post


Link to post
Share on other sites


It is a 4 stroke. It is like it is possessed or something. The carb screws should work and the overhaul should have stopped it from smoking. It is just the same as before all of the work.

People say that it needs and overhaul and the carb needs to be rebuilt, but both of those have been done. All of the hoses and boots are in good condition. It runs too fast and the engine spews out white smoke.

Thanks

Dennisg

Share this post


Link to post
Share on other sites

I'm racking my brain here what little I have left. I hope you don't get tired of the question I should do a search on your quad . But here it is. Is it water cooled. How long ago was the rebuild. was it a total motor rebuild.

Share this post


Link to post
Share on other sites

It is air cooled. The rebuild was two months ago, that is how long I have been trying to get it running right. The rebuild was just the top end, with new piston and rings and head with the valves reground. Keep the questions coming maybe we can figure something out.

Thanks

Dennisg

Share this post


Link to post
Share on other sites


Yes I used the old cylinder, but it was bored .050 over and a new piston was fitted to it. I put it all together and it still smokes like it did before the overhaul.

dennisg

Share this post


Link to post
Share on other sites

I went and did an internet search all I found was 1 site saying the head gasket would cause this but it only smoked at idle. White smoke is always been moisture. I give up sorry I'm lost on this one. I hope you find the problem & if you do post it please.

Share this post


Link to post
Share on other sites


Do you know if you put the rings on the piston in the right order.For the high idle Double check your throttle cable to see if their is an binding sometimes where it goes into the carb can be a little tricky. Does your throttle work smoothley. Even if your head is tight does not mean the gasket did not get damaged when you put it back togather Did you torque everything to specs and with a head you tighten head bolt alittle at a time lets say the specs say 25ft. pounds torque you would set your torque wrench at 10ft. pounds and tighten each head bolt in a cross pattern or x pattern and continue these steps till your at 25ft. pounds. Did you do it this away?

Edited by hangingon

Share this post


Link to post
Share on other sites

I didn't give up yet. My advice on the head is from my auto background. And that is how you install a head on a car. I feel it should be the same for a quad other wise it is easy to damage the gasket.

Share this post


Link to post
Share on other sites

I would agree with hangingon I would check the throttle cable, I had the same issue with my 89 quadrunner 250. as for the white smoke part I would check the valve seals.

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 Buell
      Hey guys, figure you guys would have some helpful direction or answers.
      So, 05 Sportsman 700 carb, new carb, fuel pump, new plugs, new air filter, new everything I can think of that is usually the running issues. Starts up fine, seems to run fine, but if under load, two people, or even one person, up a hill, or pulling a drag chain for the driveway, it starts to cut out and sputters and loses all power, until I back off on the throttle and just barely try to let itself catch itself and then I can take off again.
      I am going crazy trying to figure this thing out. Other than that, the quad runs great. Parents bought bran new, just used around the property, 5000 miles on it. Any ideas???
    • By dave3dracing
      Hi, I'm a new member
      Just bought a used 08 350 raptor with about 5 hours on it ( very clean ). Started fine when we got it. Now after a few mods (bumper, skid plates, air filter) Now will not start unless you pull in the clutch. I've checked just about everything and also checked that there is no pinched wires. Anybody have any ideas?:bangheadc: Thanks, Dave
    • By payne
      Have an Bear Tracker 250. Dont have the manual or any literature to help with. Anyhow, starts with pull start in gear, and electric starter doesnt work. Also, neutral light doesnt come on. Where should I begin?? Need some direction on troubleshooting all this. Thanks a million.

    • By Admin
      Yamaha Australia has announced it will discontinue selling Utility ATVs due to new Australian government legislation that requires the mandatory fitment of so-called Operator Protective Devices (OPDs), YMA will not sell utility ATVs after the government compliance deadline of 11 October 2021.
      “The decision to make the fitment of OPDs compulsory is disappointing. The ruling has forced us to withdraw utility ATVs from the Australian market because as a manufacturer we are not willing to gamble with our customers lives by bolting untested devices onto our specifically engineered and designed ATVs,” explains YMA Director Brad Ryan.
      As the market leader in this segment, Yamaha recognises that utility ATVs are an important part of farm operations and will comply with stage one of the new consumer legislation. This includes testing and the fitment of warning labels by Oct 2020. This will ensure that Yamaha ATVs remain available until October 2021.
      After this date customers will not be able to purchase a new Yamaha utility ATV in Australia – but sport and youth models will continue to be available. This is because new sport and fun ATVs do not need to be fitted with OPDs. In addition, side-by-side vehicles (SSVs) are not affected by this ruling, so YMA will support our utility ATV dealers and ease the transition from ATV to AG bike and SSV business.
      “Fortunately, our utility ATV customers can transition to our equally capable lineup of AG bikes and expanding SSV range,” adds YMA Director Brad Ryan.
      Customer safety has always been our priority. YMA has provided market leading rider training and promoted proven safety methods. YMA also helped develop the Shark ATV helmet which is the only fully certified farm safe ATV helmet available. YMA feels so strongly about customer safety that purchasers of new Yamaha utility vehicles will receive a free Shark farm safe helmet valued at $250 while stocks last.
      YMA is also fully committed to customer care via a national dealer network that will continue to service ATVs and with the supply of parts and accessories into the future.
      Source: https://www.dirtaction.com.au/yma-to-discontinue-utility-atvs/
  • Similar Tagged Content

    • By Guythis448
      Looking for help on wiring up stock wiring harness specifically for a '88 Honda TRX 300 
      If anyone could drop a link or send me a PM it would be much appreciated 
    • 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?
    • By Steve1266
      I went out to ride my quad today. When I started it up it ran for a minute, then died. Since then it will turn over but won't start. I've check the spark plug and get great fire. I have had this quad for about 6 months, and very new to breaking it down. But need help. Thanks
    • By suthernboy60
      Since I am not much of a mechanic simple things confuse me. How do you remove the old brake cable for the pedal brake from the frame? Thought I could just pry it out but no luck and not much room to work. Any help is appreciated.
  • Recently Browsing   0 members

    No registered users viewing this page.


×
×
  • Create New...