Hard start, running rough...
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Hard start, running rough...

This is a discussion on Hard start, running rough... within the X2/X4 Engine forums, part of the Yamaha Wolverine X2 & X4 847cc SxS category; So yesterday I pulled my new (bought last month) X2 out of the garage to do some work (light bar install, etc). Before doing any ...

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Thread: Hard start, running rough...

  1. #1
    Sunday Driver
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    Hard start, running rough...

    So yesterday I pulled my new (bought last month) X2 out of the garage to do some work (light bar install, etc).

    Before doing any electrical work, etc, I tried to start it again to pull up a bit in driveway. It would start and die, then not start, etc. And when it started sounded running on only one cylinder. Only thing I had done that might be an issue with wash out the front passenger side fender well cause I missed it last weekend when I sprayed it off. Just the hose and nozzle, no pressure washer, but spraying up under the fender well.

    After starting and dying, not starting, etc, several times intermittently over about an hour period, it finally started up and ran smooth from then on....

    I recorded it for my dealer to hear, but they are closed today.

    Any thoughts/ideas?
    2019 Yamaha Wolverine X2 R-Spec, Camo
    SuperATV front flip up windshield and rear windshield
    OEM rear fender flares
    30” lightbar (VisionX)
    3500lb winch (Harbor Freight)
    2010 Yamaha Grizzly 700 FI EPS, Green
    Previous Yamaha’s - 2001 Big Bear 400 4x4, 2002 Kodiak 400, 2002 FZ1

  2. #2
    Sunday Driver
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    Update -

    Got it out today to load up and head deer hunting. Started up but was only running on one cylinder. Pulled the plug from the non-firing cylinder and cleaned it up (was wet and black), and reinstalled. Still fired up one the other cylinder only. Decided to swap plugs and see if the problem followed the plug or stayed in the same cylinder. Problem followed the plug, so started looking for some new plugs. Had to go to local dealer - $11 each... ouch! Fired right up after putting in the new plugs.

    Not sure if it had some old gas from dealer or what, but what a pain on a new machine!
    MassiveOverkill and atkbike like this.
    2019 Yamaha Wolverine X2 R-Spec, Camo
    SuperATV front flip up windshield and rear windshield
    OEM rear fender flares
    30” lightbar (VisionX)
    3500lb winch (Harbor Freight)
    2010 Yamaha Grizzly 700 FI EPS, Green
    Previous Yamaha’s - 2001 Big Bear 400 4x4, 2002 Kodiak 400, 2002 FZ1

  3. #3
    Turbo Jimbo's Avatar
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    Yah, they tend to start and stop them quickly with no warmup / burn off at the dealers, sometimes fouling plugs I think.
    MORSNO and atkbike like this.
    2017 Wolverine R-Spec EPS, Alpine white

    Super ATV full flip windshield~Yamaha soft doors & Rear window~KFI 3000# winch & mount~Overhead gun rack~Tablet GPS
    Apeman video cam~Rear bench seat and integrated storage box~Monster Nomad blue tooth speaker~Perfex 2" lift
    Yamaha padding kit~Accessory bar~Overfenders~Sedona Ripsaw R/T 28x10R14 tires on Storm beadlock wheels ~Chupacabra side mirrors~AIS block off~X4 SE red, black, grey seats~X4 SE steering wheel~Traveller LED's

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  5. #4
    Ripsaw
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    Keep the plug and you'll get a new one from the dealer as replacement for future spare. Warranty right!!

    You should be taking out on rides, after getting it to confirm everything is ok and remains ok before an excursion like hunter or equiv. Thats not the time to discover if something is failing. Use name brand gas as well.

    No real surprise even new since the dealer is not out driving it any distance. People would complain why it has a 100 miles or more on it if they did. Testing should be done where you can get to it or close to it from cross roads if its stuck especially out alone.
    2017 Wolverine RSPec SE
    Belleville, Ont. Canada

    BearClaw HTR 27 inch tires
    Half windshield
    Roof
    Aluminum Under armor
    Yamaha Warn 3500lb Winch & Synthetic rope
    LED Headlights, Yellow Light Bar

  6. #5
    Sunday Driver
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    Put about 14-15miles on it this past weekend, and it started and ran fine. But it did the same right after picking it up from the dealer. Will be mid-January before I’m able to get it out and do some more riding.

    I’m still on the tank of gas the dealer put in it... could’ve been who knows how much old gas. Think mine was built in March or April, so could be ~6 months old. I’ll only use ethanol free gas in it.
    2019 Yamaha Wolverine X2 R-Spec, Camo
    SuperATV front flip up windshield and rear windshield
    OEM rear fender flares
    30” lightbar (VisionX)
    3500lb winch (Harbor Freight)
    2010 Yamaha Grizzly 700 FI EPS, Green
    Previous Yamaha’s - 2001 Big Bear 400 4x4, 2002 Kodiak 400, 2002 FZ1

  7. #6
    Paper Boy Fly_DMy's Avatar
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    Question:

    I saw thread stating the owner had to remove the dump bed to change plugs, please tell me that is maybe only on the older models, and not the X2?

    Haven't had to change plugs myself as of yet...

  8. #7
    Slow Poke
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    Quote Originally Posted by Fly_DMy View Post
    Question:

    I saw thread stating the owner had to remove the dump bed to change plugs, please tell me that is maybe only on the older models, and not the X2?

    Haven't had to change plugs myself as of yet...
    No you don't have to remove anything on an X2. Just tilt the box up.
    MassiveOverkill likes this.
    Wolverine X2 R-Spec
    27" Blackwater Evolutions
    Weller Racing ECU Flash
    Hunterworks Machined Sheave
    JBS Spring Kit

  9. #8
    Sunday Driver
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    Quote Originally Posted by TimBo View Post
    No you don't have to remove anything on an X2. Just tilt the box up.
    Yup! Pretty simple - 10min job including getting the tools out!
    2019 Yamaha Wolverine X2 R-Spec, Camo
    SuperATV front flip up windshield and rear windshield
    OEM rear fender flares
    30” lightbar (VisionX)
    3500lb winch (Harbor Freight)
    2010 Yamaha Grizzly 700 FI EPS, Green
    Previous Yamaha’s - 2001 Big Bear 400 4x4, 2002 Kodiak 400, 2002 FZ1

  10. #9
    Ripsaw
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    If the gas is bad the plug change isn't going to do anything. You'd be better off rigging up a hose and syphon out what gas you can get out of the tank. Get 5 gal of name brand gas (Texas I assume) Exxon, Shell as it doesn't matter. Fill the tank or close to it. The old gas will dilute to nothing and whats in the line will burn through in a bit of riding. If after at least 50 miles of normal riding its still a problem. Maybe the plugs got fowled but unlikely.

    Thats my opinion. There maybe underlying issues which the dealer did not detect as its new.
    erik likes this.
    2017 Wolverine RSPec SE
    Belleville, Ont. Canada

    BearClaw HTR 27 inch tires
    Half windshield
    Roof
    Aluminum Under armor
    Yamaha Warn 3500lb Winch & Synthetic rope
    LED Headlights, Yellow Light Bar

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