Suzuki king quad 300 idles great but Boggs when you apply throttle

[97kingquad]

Okay so I bought this 1997 sazuki king quad from a guy and he had it for a few years. 

He had it registered and on the trails last year but he said it bogged and backfired when he would try to drive it. so it sat for a year. 

I bought it for 800 bucks and got it running that night and it ran great for a few days 

But I parked it the other night and went to start it again and it was really hard to fire up and when I did it was bogging and idling high then low again.

So I took the carb out and cleaned it (ended up doing it twice because it was still doing the same thing) 

Now today I have it running slightly better, but it is still like 20% 

I have been looking it up and trying to figure it out but I can't find the issue, has anyone else had this problem? I'll attach a video of it running and giving some throttle 

[Mech]

Turn the headlight on and see if it makes a difference..

[kp3004x4]

Yes kinda sounds like a low voltage issue try cleaning the battery terminals and make sure everything has a good ground

[Gwbarm]

If cleaning the carb fixed the high low idle, i would check the fuel flow to the carb and make sure it is getting good flow and maybe the float height. If it ran good for a few days and then all of a sudden not so good, it may not be charging and the battery voltage has dropped.

[Mech]

More likely high voltage but that will test it for a crook regulator either way..  Or, a regulator with a bad wire or earth..

[DayBreakJim]

Make sure the carb isn't letting gas leak into the throat. My King quad did this and I could only figure out what was going on by looking into the carb while the bike idled. I attached the video of what was happening and a picture of the piece that I needed to replace. Also changing those o rings didnt fix the problem bc it was leaking from the center circle where the needle goes.

Edited July 22, 2023 by DayBreakJim

[kp3004x4]

Looks like carb is messed up not letting the needle slid evenly up and down,also doesn't look like needle is set so that it goes down,what do all of you think?

[DayBreakJim]

The piece was worn down somehow and no matter what I did it would let gas slip by. Once I replaced the piece the carb operated fine. Here's a video of it idling once I replaced the piece. I needed the slide from the other carb as well

 

 

[Mech]

Can't see the video but Jim's problem sounds to me like too higher fuel in the float bowl.

[Gwbarm]

Needles can stick and not slide fluidy, looks like yours is leaking around the needle, there is a piece thats hold it tight that can get out of position.

[Mech]

On those things there are about five bits that position the needle.

[97kingquad]

17 hours ago, Mech said:

On those things there are about five bits that position the needle.

I positioned the needle to the fourth from bottom and reset the fuel screw to recommend setting. I'll see how it runs now and go from there

[JustRandy]

On 7/20/2023 at 6:03 PM, Mech said:

Turn the headlight on and see if it makes a difference..

Wonder where you learned that lol

I guess the world can be changed a little bit.

[Mech]

Randy, I've known that for about ten years before you'd ever experienced the problem and came into forums looking for advice about it.. Even my early teen sons knew about it before you..

The difference is that we all know it can be a dirty or broken wire, That it's not always a dud regulator like you reckon..

[97kingquad]

Okay so I went through and tested the regulator rectifier/ stator and it seems I'm not getting almost any voltage. 

Would that cause all this fuss? 

It ran great for a few days and now it will only idle if I rec it up it Boggs and dies if I don't flutter the throttle. 

My battery was dead before when it ran well also and it doesn't change when using a booster pack.

Maybe it just doesn't get enough volts at higher rpm?

[Mech]

Actually Randy..  I was just thinking about it because it's so comical, and I knew about it before my sons were even a twinkle in their mum's eye, and they are thirty and thirty-two now, and they were both familiar with it when they were about fifteen, maybe twelve.

 

[JustRandy]

If that were true then you'd have 22 solutions and I wouldn't have any.

You may fabricate the past in your head but you can't do it here.

 

[Mech]

Er.. What's that little tick under your name tag there about Randy, and why do I have twenty-one under my name ?

I saw you going looking, clutching at straws in the old threads..

You're an idiot Randy and you just don't want to learn..

[JustRandy]

Oh are we allowed to call people names now?

It doesn't matter because slander is the tool of the loser.

1 hour ago, Mech said:

why do I have twenty-one under my name

It's your narcissism score.

21 poor souls got terrible advice.  It's a shame I could only save one.

[Mech]

Yeah well we'll let people decide that for themselves.

You "logic", if that's what you call it, goes something like this..

R  I skidded on a slippery road and had a crash once.

M  Perhaps you dozed off, or were going too fast, or your tyres needed attention.

R  No, only slippery roads cause crashes. Nothing else but slipper roads cause crashes, and here's a whole heap of newspaper clippings to prove it.

M But Randy, I could find you a whole lot of newspaper clippings showing that speed causes crashes too. People should slow down and make sure they aren't tired and check their tyres. Every police department says to slow down and check your tyres. It's well known that speed can cause crashes.

R No, that's bad advice.. People shouldn't slow down or check their tyres. That's bad advice Mech.

 

Yes sir.. 

Like you say Randy, the internet is a big place and we can't hide from our posts..  I know when you got into quads, I know when you first had a regulation problem, I seen you asking for help to diagnose it.. 

But, like you also say, you just come in here to argue..  And like I keep saying, I come in here to help people, and you Randy, can't be helped..

You carry on, someone might feel like a stupid and pointless argument, but I have trouble lowering myself to your level of stupid.. I can't oblige you.

[Gwbarm]

Thats a good thing to do 97, do you mean you are not getting any voltage from your stator, or regulator. What about the pick up coil.

[JustRandy]

1 hour ago, Mech said:

Yeah well we'll let people decide that for themselves.

You "logic", if that's what you call it, goes something like this..

R  I skidded on a slippery road and had a crash once.

M  Perhaps you dozed off, or were going too fast, or your tyres needed attention.

R  No, only slippery roads cause crashes. Nothing else but slipper roads cause crashes, and here's a whole heap of newspaper clippings to prove it.

M But Randy, I could find you a whole lot of newspaper clippings showing that speed causes crashes too. People should slow down and make sure they aren't tired and check their tyres. Every police department says to slow down and check your tyres. It's well known that speed can cause crashes.

R No, that's bad advice.. People shouldn't slow down or check their tyres. That's bad advice Mech.

 

Yes sir.. 

Like you say Randy, the internet is a big place and we can't hide from our posts..  I know when you got into quads, I know when you first had a regulation problem, I seen you asking for help to diagnose it.. 

But, like you also say, you just come in here to argue..  And like I keep saying, I come in here to help people, and you Randy, can't be helped..

You carry on, someone might feel like a stupid and pointless argument, but I have trouble lowering myself to your level of stupid.. I can't oblige you.

Looks like you forgot to take your meds, Narcissus.

You totally ignore the guy wanting help while you pout and cry.

4 hours ago, 97kingquad said:

Okay so I went through and tested the regulator rectifier/ stator and it seems I'm not getting almost any voltage. 

Would that cause all this fuss? 

It ran great for a few days and now it will only idle if I rec it up it Boggs and dies if I don't flutter the throttle. 

My battery was dead before when it ran well also and it doesn't change when using a booster pack.

Maybe it just doesn't get enough volts at higher rpm?

If it ran great with a dead battery that is evidence that the regulator is faulty.  It's a known issue on these quads.

The higher the rpms, the higher the voltage will be unless the regulator regulates it properly.  Once the voltage gets to 18v the cdi will not function.  Having a dead battery will act as a regulator and lower the voltage so the engine will run better.  That's why Mech said to try turning the lights on to see if it runs better.  I taught him that a year ago and he can't stand it.

[Mech]

You need a good battery in it 97. Try switching the headlights on and see if it makes a difference..  The lights will provide the load the battery isn't.

[97kingquad]

15 hours ago, Gwbarm said:

Thats a good thing to do 97, do you mean you are not getting any voltage from your stator, or regulator. What about the pick up coil.

Stator, I unclipped the wiring that comes from behind the rear tire and tested with my multimeter and I read less than 1 volt on all of them 

[97kingquad]

15 hours ago, JustRandy said:

Looks like you forgot to take your meds, Narcissus.

You totally ignore the guy wanting help while you pout and cry.

If it ran great with a dead battery that is evidence that the regulator is faulty.  It's a known issue on these quads.

The higher the rpms, the higher the voltage will be unless the regulator regulates it properly.  Once the voltage gets to 18v the cdi will not function.  Having a dead battery will act as a regulator and lower the voltage so the engine will run better.  That's why Mech said to try turning the lights on to see if it runs better.  I taught him that a year ago and he can't stand it.

Ok so I tired switching the headlights on but it makes no difference from what I can tell. 

 

I have removed the carb at least 20 times now adjusting the needle and set screw but none of it has had any impact on my issue. The only thing that has made the bike run better and hit any higher rpm is actually removing the cover from the air intake. It runs almost well. 

I know it is not supposed to be like that but I really can't figure it out. There's no debris in the intake and the carb is pretty clean. The Jets and vacuum lines all seem clear. 

Why does it need more air? Even when I max out the set screw it starves for more

[97kingquad]

15 hours ago, Mech said:

You need a good battery in it 97. Try switching the headlights on and see if it makes a difference..  The lights will provide the load the battery isn't.

But it was running great without one shortly before all this. And now when I remove the airbox cover it runs pretty well but backfires here and there

[Ajmboy]

@JustRandy and @Mech can we all just get along...lol. Your help is invaluable to the community and greatly appreciated, so lets not argue. What a great scenario to have different points of view and contribution to solve an issue, but without the derailing of the topic and name calling please... Sets the wrong tone. 🙂

 

[Gwbarm]

Did raising the jet needle not do anything.

[Mech]

Are you aure you sparkplug and coil are good ?

It's not good enough just looking at the sparkpklug when it's out and sparking, they can fail under load.

You also need a good battery and it's very likely here that you more than one fault.

Do you have a timing light ? Put it on and watch it while the bike starts to faulter. If the spark get intermittent then the spark is breaking down.. But that doesn't test the spark plug.

 

[97kingquad]

19 minutes ago, Gwbarm said:

Did raising the jet needle not do anything.

It changes the way it Boggs a bit but I seen no difference in the rpms unless the airbox cover is off