Motorcycle

Motorcycle Questions? Ask a Mechanic.

Ask an Expert,
Get an Answer ASAP!

Motorcycle

I have a 98 Artic CAt 454 4x4 4 wheeler..the problem is that

Customer Question
it barely runs, back fires...
I have a 98 Artic CAt 454 4x4 4 wheeler..the problem is that it barely runs, back fires, won't pickup on rpm. It will sit and idle fine. If you turn headlights on it will rev up a little, but still backfires. Kinda seems like it does when you have a reverse gear limiter on. Like the timing is off. But I don't think this year of 4 wheeler has one. I have tried new plug, checked and cleaned and dialectic greased all connections.Along with the coil, CID unit, rectifier and plug on harness and grounds. The air filter is good. Spark at plug seems fair, may not be as good as it could be....Have had it at the shop before this problem and they said it was the carburator. It would act up once in awhile but now it does it all the time. Seems like when it is damp outside is when I would have the most issue. I think it is electrical issue but just not sure where to start.
Submitted: 6 years ago.Category: Motorcycle
Show More
Show Less
Ask Your Own Motorcycle Question
Answered in 5 minutes by:
8/13/2011
Motorcycle Mechanic: ...., .... replied 6 years ago
....
...., ....
Category: Motorcycle
Satisfied Customers: 4,983
Experience: ............
Verified

Brian :

Good day and welcome to Just Answer. My name is Brian and I'd be happy to help you with your problem today.

Brian :

When was the carb last serviced completely & the valves last adjusted?

JACUSTOMER-v3qqhle3- :

carb was serviced about a month ago.. Not for sure about the valves...The carb is not the problem

Brian :

how do you know the carb is not the problem?

Brian :

It sure sounds like a fuel delivery & breathing issue to me

Brian :

do you have a multi meter?

JACUSTOMER-v3qqhle3- :

I have had it worked on several times...i take the air filter out and still the same thing...new jets and needle were put in.

JACUSTOMER-v3qqhle3- :

yes i do have a multi meter.

Brian :

just so yo are clear & know, your timing is fixed & can not move. It is electronically controlled, your timing is not off

JACUSTOMER-v3qqhle3- :

yea but has something gone wrong with electronics somewhere to make the timing be off?

Brian :

that doesn't mean anything, you could have a bad carb set up, changing jets with a bad set up will get you nowhere.

Brian :

What color is the plug tip showing?

Brian :

what jets are in the carb?

Brian :

where is the fuel mixture set?

Brian :

will you be able to adjust the valves or will it need to go to the shop for that?

JACUSTOMER-v3qqhle3- :

color--light brown.....factory jets are in it......the fuel mixture i am not for sure.....I really don't think it is the valves cuz it runs fine, then acts up, and then runs fine...and why would damp or moisture affect the carb?

Brian :

i don't think damp or moisture is effecting anything, I think that is a coincidence

Brian :

I know your valves need checked, they need check every 20 run hours

Brian :

And they only get tighten when it gets hot or you start adding rpm, your engine can;t breathe.

Brian :

Because of the lighting/rpm issues though I do want to check the charging system, I need these voltages from the battery terminals;

Brian :

Key off

Brian :

Key on

Brian :

Start button depressed/engine cranking

Brian :

idling

Brian :

about 2K rpm

JACUSTOMER-v3qqhle3- :

I will go check this out and be right back

JACUSTOMER-v3qqhle3- :

I will be back

Brian :

cool

JACUSTOMER-v3qqhle3- :

key off--12-13.....key on same.....engine cranking--11......idiling--17-18.....the battery is charged and the meter I used was a cheap walmart one.

Brian :

wow, 17 - 18, that is an over charge & indicates a bad regulator... can you unplug the stator & test test stator leads by checking between each pin in the stator plug for ohms?

JACUSTOMER-v3qqhle3- :

Is the stator down by the flywheel? and the wires run to the CID unit?

Brian :

yes that is where it exits the engine, you want 3 white or yellow wires together, they go to the regulator not the cdi box the regulator is finned & metal the cdi is plastic

JACUSTOMER-v3qqhle3- :

the regulator i know where it is....i can run test..what test do you want me to run....what spades and such

Brian :

unplug the regulator from the stator, using the stator side of the plug you number each pin 1, 2, & 3. Set the meter on ohms & check 1 - 2, 2 - 3, & 1 - 3

Brian :

then test between each pin & battery ground

JACUSTOMER-v3qqhle3- :

i will go check this out...might be a little bit....be right back though

Brian :

ok

JACUSTOMER-v3qqhle3- :

i am back

JACUSTOMER-v3qqhle3- :

I had the meter set at rx 10..found 3 yellow wires...1-2 was 4.5....2-3 was 4.5... and 1-3 was 7 and when did the ground it did nothing and there was 2 black wires on plug in and tested those to ground on battery and it shows the regultor is grounded.

Brian :

great the stator is ok, battery is ok, regulator is cooking the system, you do not want more than 13 - 14 volts going back to the battery otherwise your ignition can't take that.

Brian :

17 - 18 is an over charge & a bad regulatot

JACUSTOMER-v3qqhle3- :

if i replace the regulator will that take of the problem...or are there other issues?

Brian :

I think there are also some fuel delivery issues that need straightened out once this is straightened out, because the carb has been messed with to try to solve this.. so that will need straightened out.

Brian :

And you need the valves checked at least

Brian :

thanks for the testing

JACUSTOMER-v3qqhle3- :

If you only knew how many times the carb has been worked on and it never seems to take care of the problem...how come it can sit and idle fine and it is an irratic type deal...quit--run etc. do I need to replace the carb? ur welcome about testing.....i would agree about valves if it was an issue that gradulally got worse but it is an erratic problem

Brian :

you don't have to agree or disagree about the valves the fact of the matter is on your engine they need checked every 16-20 hours regardless. That is just a fact.

Brian :

No, carbs are 100% rebuildable & that is what I said earlier about bad set up, but without further details about how it is set up I can't offer much other than to say it needs straightened out

Brian :

it will sit & idle fine because it kind of forces itself to do so once it is running. They'll idle all day long with spark & fuel

Brian :

adding load changes things significantly

JACUSTOMER-v3qqhle3- :

ok...thank you for your time....

Brian :

It doesn't really matter how much the carb has been worked on, what matter is if who worked on it knew what they were doing or not

Brian :

If the set up is wrong, you'll never get anywhere.

Brian :

If you want to reply back later with current jet sizes other than "stock", a mixture screw setting & needle clip setting if applicable I will come up with a set up for you to dial it in with

JACUSTOMER-v3qqhle3- :

why would turning the headlights on make it run a little better?? that would not be a carb issue

Brian :

that is the charging issue

Brian :

& why we tested the charging system

JACUSTOMER-v3qqhle3- :

we have changed jets, they had it leaned out so bad one time it was pinging and i was worried about blowing the motor up so i put the stocks back in.

Brian :

"stock" means nothing, selling dealers decide final jetting, a set up can not be determined without knowing the jet sizes

JACUSTOMER-v3qqhle3- :

will try to get carb off today. will get jet numbers. see what needle is set at . when it was at shop one time I told them to order new jets and needle a put them in so they could rule out that as problem.

Brian :

that isn't how setting up a carb works. You don't just order jets & install them hoping to rid yourself of problems

JACUSTOMER-v3qqhle3- :

yes i know this . i use to race motocross. we use to lean bikes out and make them richer with the jets. the 4 wheeler ran perfect on the jetting that was in it up until a week or so then i started having the problem that i discribed it would just happen once in awhile a would clear it self up and run fine.now it just acts up all the time. i was hoping i could get some help here because mechanics around here cannot help me out. sorry for wasting your time. thanks

Brian :

you haven't wasted my time & I thought we made some killer progress.

Brian :

We know you need a valve adjustment, that is a fact, like it or not, believe it or not, it is a fact

Brian :

we also know that the regulator is bad. Too much voltage will cook the ignition & can cause all kinds of issues

Brian :

we also know that the carb has been altered from what it was when the machine was operating well. That will likely need re-adjusted when the regulator is replaced & the voltage issues are straightened out.

Brian :

You were looking for a magic bullet, when in fact you have several issues that need addressed. I'm sorry that you are not happy with the info that you got, but it is what it is.

Brian :

You actually have an electrical issue, a breathing issue & a carburetion issue.

Ask Your Own Motorcycle Question
Ask .... Your Own Question
....
....
...., ....
Category: Motorcycle
Satisfied Customers: 4,983
4,983 Satisfied Customers
Experience: ............

.... is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Jeff Policky

Jeff Policky

Motorcycle Mechanic

2,425 satisfied customers

Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP

Louie

Louie

Technician

1,239 satisfied customers

25+ yrs. experience

TIMOTO

TIMOTO

Motorcycle Mechanic

1,231 satisfied customers

Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.

Andre Pilon

Andre Pilon

Motorcycle Mechanic

1,032 satisfied customers

Over 25 years experience, ICS, MMI, Owned shop for 12 years, worked tech-support for Harley Davidson

Kenny O.

Kenny O.

Motorcycle, ATV, Mules, Side by Side's Product Specialist. All Brands

619 satisfied customers

Worked for Kawasaki Motors as a Product Support Specialist (Factory Support) for 24 years

asphaltcycles

asphaltcycles

Motorcycle Mechanic

458 satisfied customers

I operate a motorcycle dealership and CCS Ducati Race team.

Glenn Adams II

Glenn Adams II

Motorcycle/ATV Technician

393 satisfied customers

6 years Motorcycle/ATV/Water Craft; 4 years auto; 18 years carpenter

< Previous | Next >

Related Motorcycle Questions
Working on a Kawasaki Prairie 400 4 x 4 will not start has
Working on a Kawasaki Prairie 400 4 x 4 will not start has weak spark but won't fire even with starting fluid… read more
Louie
Louie
Technician
Associate Degree
1,239 satisfied customers
I have a 08 street glide with bub 6''boom can pipes .The
i have a 08 street glide with bub 6''boom can pipes .The baffles are still in . IS THERE A EASY WAY TO reduce the sound a little. i leave early in the morning ,love the pipes , except when leaving the… read more
....
....
....
4,983 satisfied customers
02 Yamaha big bear 400 no spark, Just told you, Just told
02 Yamaha big bear 400 no spark JA: What's the make/model/year of your bike? Customer: Just told you JA: What is the model of your '02 motorcycle? Customer: Just told you JA: Are you fixing your bike … read more
Louie
Louie
Technician
Associate Degree
1,239 satisfied customers
Your answer to my question was inadequate. There are no
Steve, your answer to my question was inadequate. There are no screws on the outside of the lens on my 1995 Dyna.… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
Well all of a sudden i started to hear a knocking for fo
Well all of a sudden i started to hear a knocking for fo reason on thing that ive done reasonly was an oil change!!! Could it be the oil … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
2007 arctic cat ATV. 700 efi. Not a motorcycle atv. I am.
i am . pulled the plate off the back of the front differential so i could change the u joints … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
2003 335 with thermal box and regulartor/ rectifier problems
2003 335 with thermal box and regulartor/ rectifier problems replaced with new box and new harness have years of polaris experience but same problem fan runs all the time and temp light stays on cant … read more
Louie
Louie
Technician
Associate Degree
1,239 satisfied customers
I installed a fuel tuner on my 09 Street Glide could not get
I installed a fuel tuner on my 09 Street Glide could not get it to crank raw fuel ran out of the throttle body and the exhaust finally got it started with wide open throttle took the tuner off connect… read more
Ronald Brown
Ronald Brown
Technical
1 satisfied customers
I need a good tuner and autotune for my 2006 CVO FLSTFSE2
I need a good tuner and autotune for my 2006 CVO FLSTFSE2 Fat Boy with V&H Big radius 2 into 2 exhaust with wide band O2 sensors. Is there a Harley solution like the street pro and smart tune pro auto… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
Need to replace the tail light bulb 1995 Dyna Glide, tail
Need to replace the tail light bulb 1995 Dyna Glide … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
2001 HARLEY SOFTTAIL SHUTDOWN WHILE RIDING HAD TOWED HOME
2001 HARLEY SOFTTAIL SHUTDOWN WHILE RIDING HAD TOWED HOME HAD BATTERY CHECKED TOLD WAS SHORTED SAT 3 MONTHS NOW I BOUGHT BATTERY TURNS OVER SLOWLY TOOK PLUGS OUT TURNS A LITTLE FASTER BUT STILL NOT FA… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
My father has a 08 softail custom 96 cubic inch, he upgraded
My father has a 08 softail custom 96 cubic inch, he upgraded to the 103 kit and is looking for a replacement battery. We've heard Gel batteries are a better option to go with. I guess what I'm trying … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
2007 Ultra Classic cruise control does not turn on.
I have a 2007 Ultra Classic and the cruise control does not turn on with the handlebar SET switch.… read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
2013 Fatboy Lo. I'm told the fuse box is under the seat but
2013 Fatboy Lo. I'm told the fuse box is under the seat but I do not see it. I found a module with 3 fuses--a 40 and two 15s but nothing more. I want to depressurize mu fuel system since I have a clog… read more
Ronald Brown
Ronald Brown
Technical
1 satisfied customers
We have a KTM 2008 450 EXCR. We have a 2008 KTM 450 EXCR.
grand son son road it said it smoked a little then came to a stop. Starter locked up kick starter locked up too. It's 4 stroke … read more
Chris (aka - Moose)
Chris (aka - Moose)
Vocational, Technical or Trade Scho
108 satisfied customers
Rzr not a motorcycle can you help. 2011 Polaris ranger. The
the check engine light is on. the*****wont work and the lights wont work. all the fuses are good … read more
Kavey
Kavey
86 satisfied customers
I have a 2008 fxdc which has 9000 kilometers on it. it seems
i have a 2008 fxdc which has 9000 kilometers on it. it seems to have too much play in primary chain? do the auto tensioners need to be readjusted or is this normal… read more
Brian D
Brian D
Genral Manager, shop foreman, dyno tuner
High School or GED
536 satisfied customers
Its not a motorcycle but a deere uatv that we are having a
its not a motorcycle but a john deere uatv that we are having a problem with the mikuni carbuerator … read more
Steve
Steve
I&C technician
Vocational, Technical or Trade Scho
6,976 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x