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.

Marcus

New to quads in desperate need of help please ltz 400 starting nightmare

Recommended Posts

Hi guys new to this had a few mx bikes in the past and always fancied a quad so bought myself a 2004 ltz 400 bored out to a 450 only bought it last week and 1st time on it yesterday 

so everything was running smooth was just getting used to driving it on the road was out for maybe an hour not thrashing it just taking my time then all of a sudden started sort of bogging lost all power and cut out I don’t have a clue what it is tried starting it but nothing the starters going and every couple of seconds get like all I can describe is like a compression stroke  the petcock was set on prime and I didn’t notice whilst riding I don’t no weather I may have flooded the engine 

I have took the spark plug out tested it it sparks great no problem 

I took the carb off nothing give it a quick looking over nothing seems to be wrong with that although when I put the choke on and try start fuel comes out of the over flow :S 

the air filter was soaking with petrol 

any help would be great please guys my 1st day on the quad has not been good 

Share this post


Link to post
Share on other sites


With the fuel  shut off, try  removing the spark  plug  and   spin   it  over  for   a few seconds to  dry out the  cylinder if  it  may  have  been  flooded. Dry out the  air filter.  With the air filter off so  you  can see what's happening , try  turning the  fuel   on and starting the engine.  It's  possible the  float  had stuck allowing the carb to  overfill and flood the  motor  out.

  • Like 1

Share this post


Link to post
Share on other sites

Topic moved to Suzuki forum. @Marcus, I removed your three other topics on this same subject. You do not need to post in multiple forums, try to keep it to one topic per theme/issue. Thanks.

  • Like 1

Share this post


Link to post
Share on other sites
4 hours ago, Marcus said:

Hi guys new to this had a few mx bikes in the past and always fancied a quad so bought myself a 2004 ltz 400 bored out to a 450 only bought it last week and 1st time on it yesterday 

so everything was running smooth was just getting used to driving it on the road was out for maybe an hour not thrashing it just taking my time then all of a sudden started sort of bogging lost all power and cut out I don’t have a clue what it is tried starting it but nothing the starters going and every couple of seconds get like all I can describe is like a compression stroke  the petcock was set on prime and I didn’t notice whilst riding I don’t no weather I may have flooded the engine 

I have took the spark plug out tested it it sparks great no problem 

I took the carb off nothing give it a quick looking over nothing seems to be wrong with that although when I put the choke on and try start fuel comes out of the over flow :S 

the air filter was soaking with petrol 

any help would be great please guys my 1st day on the quad has not been good 

are you saying the starter is not rolling the engine over ? 

Share this post


Link to post
Share on other sites

Thanks davefrombc I will try that and let you no 

The starter is roping the enngine over ever so slightly just getting slight little juggers and little puff out the exauhst but nothing like it should 

and sorry about posting it multiple times new to this site didn't really no what I was doing :S 

Share this post


Link to post
Share on other sites


Think I may have found the problem  as I was about to strip it down i noticed the petcock isn't working when the fuels off it's still on. Constantly on  I filled the tank 5 minutes before I broke down I think when I have filled it the pressure of the full tank has caused the petcock to fail as it's been in storage for a while since before I bought the quad the quad was sat for 5'mins then when I have drove it 2 minutes later it cut out I think it had flooded itself im ordering a new one tonight then hopefully problem solved 

 

 

just how do I go about clearing the engine now if it's flooded  just try turning it over a few times with no fuel ???

Share this post


Link to post
Share on other sites

Easiest way to  clear  it  is to  pull the  plug  and spin it over  for a few seconds.  The  petcock failing open  shouldn't make it  flood though.The  float in the carb is  what limits the fuel  flow into    and the level  in the  carb. If the  needle sticks   slightly open  then   the vehicle  will  flood. . You  should be able to  leave the  petcock open  for   days on end without it  flooding.  You  may  have a float  or bad  needle and seat  for the  float,or something as  simple  as a small  piece of crud  stopping the  float needle from  fully closing off the  fuel when the carb is full.

 

  • Like 1

Share this post


Link to post
Share on other sites

I’ve ordered a new one anyway was hoping that would solve it I will pull the plug and let it spin for a little tomorrow then try again with the plug in 

suppose I’m gonnna have to strip the carb as well not looking forward to that I did it once with a yz125 I had and messed all the jetting up :( 

lets hope it’s just the float sticking   

Thanks for all the help Dave 

Share this post


Link to post
Share on other sites

Right still no better not starting I turned it over without the spark plug little puff of smoke came out did it a couple of little times nothing

stripped the carb checked the float valve everything's good  

I have no idea   I videoed it if I can upload it  can anybody help :)  

IMG_0494.MOV

Share this post


Link to post
Share on other sites


Posted (edited)

About all I  can suggest  is  to  make  sure you're getting  spark,  ( you could try  a  new  spark  plug)  and fuel.  If it's getting  both  it should run. If there's no  spark ,  you'll  have to  start  checking ignition  components .   When  you checked the carb out , did you  turn  the  idle  air  screw  in  and  out ? .  It should  be set about   1 1/2  to 2  turns  out  from  lightly  seated  to  start.. After it  is running  you  can tweak  it   for best performance , not  bogging or stumbling when you go  to  accelerate  from  idle.

Edited by davefrombc

Share this post


Link to post
Share on other sites

New spark plug still nothing can't get my head around it there's a bare wire hanging out if the wiring loom don't no what from will hve to split the loom to find it but all I can think is maybe it's touched the frame and shorted something I am completely lost if that isn't the case I'm sending it off to a mechanic better empty the money box 😏

Share this post


Link to post
Share on other sites

Just giving you guys an update not many people on here seem to update on when they have found the problem so I Sent it off to the mechanic he did a compression test and nothing he said straight away it will be your valves or rings  he's started work turns out a valve had  dropped and the piston has bent it so he's on with fitting a new one trying to get it sorted for me tomorrow fingers crossed that's all it is 

what a nightmare !! Can't wait to get back onit 

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 Forum Topics

    • Just bought a CForce 500

      I've noticed that it is difficult to shift out if Park & Reverse if stopped on a hill. Is there a trick that I need to know?

      By IDaman, in CFMOTO ATV Forum

      • 0 replies
      • 1 view
    • bought a suzuki side by side a the scrap yard

      I just bought a suzuki side by side a the scrap yard  it says its a LT 400 and I need to know if its factory are a homemade job I'm either gonna use its part for my other suzuki atv are restore it 

      By Chomp, in General ATV Discussion

      • 2 replies
      • 106 views
    • YFM250 carb problems not running right

      I have a yamaha beartracker 250 (yfm250) its not running right. starts fine mostly ...idles but if i give it gas it boggs out and dies before it even can carry its self ... I cleaned the carb ... put everything back and same issue. so i bought a new carb and intake boot.... replaced both things and still the issue persists.  So i have a new carb .... does the Air fuel mixture need to be set on the new carb? If so how do i do that? i ave looked everywhere for details on my bike and carb but cannot find anywhere that reads that the skrew needs to be adjusted out to  7 full turns or somthing to that effect..   The bike ran fine until bad gas was put into it... i did remove and empty the gas tank. removed petcock cleaned and rebuilt that..... i also noticed that the new carb ....the bottom skrew for draining the bowl was closed all the way when i got it.. carb wouldnt get gas until i loosened it... now the bowl will drain ... i thought that that float stops this from happeneing....am i wrong?      

      By Austin Phillips, in General ATV Discussion

      • 2 replies
      • 98 views
    • 1990 Suzuki LT 4wd need help running issue

      my atv will start right up will idle fine soon as i try to throttle up engine dies,i have changed gas,new fuel pump and lines great compression 188 lbs.new coil new spark plug adjusted valves dont know what to do also rebuilt carb,any help wanted

      By joseph, in Suzuki ATV Forum

        
      • 34 replies
      • 760 views
    • 2001 Quadrunner 500 Running Problems

      Hi all, Picked this bike up about a month ago, and started doing some work on it. I ordered a carb kit from China, but got tired of waiting for it so I went to the bike shop today and picked up a Shindy rebuild kit. Took the carb out of soak, it has been in there for a month, blew all the ports out, cleaned what I could with a guitar string, used air as best I could to make sure everything was clear. After I was satisfied the body was clean I out the kit in it. Got the floats set to 13mm as per the manual (well 12.87 on one side and 12.92 on the other, so close), set the pilot to a little less than 2 1/2 turns out (manual says 2 3/8 turns). Put everything back together and tried to start it, it started and had a week idle. I tried adjusting the idle screw and as soon as I turned it the bike died. Backed it out and tried again, same result. Left it backed out, started it again and gave it some throttle. As soon as the throttle is touch the bike dies. Changed the spark plug for a new one and checked the spark, good and really strong. I am thinking that I have a bad petcock and am not getting enough fuel to the carburetor. So when I press the throttle I am increasing air but starving for fuel, bike can't run on air alone so it dies. Does this line of thinking make sense? I am gearing up a bottle with a fuel line in it, so I can try gravity feeding fuel to the carb, just have to wait for the silicone to dry so won't be able to test till tomorrow.  If it turns out to be a bad fuel valve, I will most likely just replace it with a universal one. If I go this route, what do I need to do with the breather line off the carburetor that used to go to the OEM petcock? Block it off or leave it open? Any help, answers or other ideas of things to check would be greatly appreciated. I have a fishing trip at the end of the month and would love to have my bike running by then. 

      By Coyote251, in Suzuki ATV Forum

      • 11 replies
      • 532 views
  • Recently Browsing   0 members

    No registered users viewing this page.


×