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X2/X4 60+ MPH Club

This is a discussion on X2/X4 60+ MPH Club within the Wolverine X2/X4 General Discussion forums, part of the Yamaha Wolverine X2 & X4 847cc SxS category; Disclaimer: This always comes up and I have to explain it ad nauseam to the those who say: "Why would you ever need to go ...

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Thread: X2/X4 60+ MPH Club

  1. #1
    Super Moderator MassiveOverkill's Avatar
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    X2/X4 60+ MPH Club

    Disclaimer: This always comes up and I have to explain it ad nauseam to the those who say: "Why would you ever need to go faster than 'insert random top speed here'?!?!?!? I never go over 'insert random top speed here' when I'm on the trails!! Why would you (wipes foaming froth from mouth) ever blah blah blah!!"

    Well, good for you! There are some states which are ATV/SxS friendly and you can get your OHV licensed for on road use. In my case my X4 is my daily driver. I live in a small town. I drive from my driveway to the trail head without the need to purchase a $3K trailer or $35K truck to haul it. I can go to the local burger joint or ice cream place in my SxS or pick up or drop my daughter to\from school. Sometimes to get to the trail head I travel on the highway and the speed limit can be 65 MPH and in order to keep up with traffic, going 55 MPH steady, even uphill is desirable. I don't know of a single soul who wants to go 60+ MPH in an X2 or X4 wanting to do it for racing purposes. MAJORITY want to do it for the reasons I just laid out. We now return you to your regularly-scheduled post:


    In chronological order (speeds are assuming relatively flat ground unless otherwise noted)

    1) MassiveOverkill: 64 MPH @ 5300' soft cab, roof, windshield, 27" Terrabites, Hunterworks prototype sheave, swiss-cheese airbox, 22 gram weights, SpeedoHealer, Weller Racing ECU flash, HMF Exhaust.
    2) Weller Racing---: 63 MPH with 28" tires on dyno
    3) JBS------------------: 71 MPH peak going downhill @ 1700', unknown on flat, 29" tires with windshield/rear soft window, shim, modded air filter lid, JBS sheave, Weller Racing ECU flash
    4) Shortbus453----: 65 MPH @ 800' on 28" tires, roof, front and rear windshield, JBS sheave w/shim and 18 gram OD weights, Weller Racing ECU flash.
    5) Jason Marsh-----: 61 MPH @ 2300' on 27" tires, JBS sheave, Weller Racing ECU beta flash. No video proof yet and other details such as shim unknown.
    6) Jimyedy15-------: 61 MPH @ 1200' on 26" tires, JBS sheave, Weller Racing ECU, windshield, top, no shim, stock OEM weights, and 2 passengers.
    7) Timmy: 65 Downhill, 61 flat @ 1700; stock 26" tires, roof, windshield, rear window, Weller ECU flash, guessing 16 or 17 gram weights
    8) Hunterworks: 62 MPH @ sea level, 28", Hunterworks sheave with 18 gram weights, Weller ECU flash
    9) 338weatherby: 64 MPH @ 1300', front&rear glass, roof, 28" tires, Hunterworks production sheave with 18 gram weights, Weller ECU flash, HMF exhaust
    10)Wherry 62 MPH @ 1100', 28" tires, JBS sheave with
    11) Alex: 62 MPH @ seal level, 28" tires, JBS sheave with 20 gram weights and shim, Weller ECU flash, front and rear windshield, roof
    12) Timbo 61 MPH @ 2800', 27" Blackwater Evos, Hunteworks sheave with 20 gram weights, Weller Racing ECU flash, half windshield, roof, on a gravel road.


    Last edited by MassiveOverkill; 07-26-2019 at 06:44 AM.
    2018 Blue Wolverine X4
    First Wolverine X4 to break the 60 MPH barrier
    Over 6000 miles and 425 hours
    Hunterworks prototype sheave with easy cleanout port, 22 gram HV weights
    Weller Racing ECU flash
    HMF Titan Series Quiet slip-on Exhaust
    Walker Evans shocks
    Swiss-cheesed airbox lid
    NGK Laser Iridium spark plugs
    Tinkseal additives
    STI HD beadlocks wearing Tusk Terrabite 27x9x12 tires
    OEM windshield, soft cab, and roof
    OEM skid plates
    OEM rock sliders
    OEM A-arm guards
    OEM cargo box
    Check out the Yamaha X2/X4 FB group: https://www.facebook.com/groups/WolverineX2X4/

  2. #2
    Pavement Princess
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    More info please!!!!!!!!!!
    I used the google feature. This looks interesting. Cant wait for some feedback.
    Last edited by 4snowandrally; 10-05-2018 at 07:27 PM.
    MassiveOverkill likes this.
    2018 Yamaha Wolverine X4
    2015 [email protected]*&^&S Sportsman 850 SP
    12 Volt Yamaha Raptor

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    Experienced Piston Yamaha's Avatar
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    Just checked out their website. I'm pretty excited.
    MassiveOverkill likes this.
    Wolverine X2 R-Spec SE
    27" Big Horn 2s, SuperATV Flip Windshield, Yamaha Soft Cab, Yamaha Cargo Box, Kolpin 3500# winch w/ synthetic rope, KFI winch mount, UPI Inferno Heater, JBL PRV-175 stereo, Polk 6.5 speakers, Garmin Drive 60 with VV Mapping. Lots of other little things.

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  5. #4
    Super Moderator MassiveOverkill's Avatar
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    Quote Originally Posted by 4snowandrally View Post
    More info please!!!!!!!!!!
    I used the google feature. This looks interesting. Cant wait for some feedback.
    Weller Racing has cracked the ECU and can now:

    1) Bypass the speed limiter
    2) Increase the rev limiter (due to the long stroke design of the motor, only a small increase is recommended)
    3) Lower fan switch temperature activation
    4) Modified fuel/spark tables which is optimized for 91 octane but you can still use lower grades such as 87 or 89 without fear.
    Last edited by MassiveOverkill; 06-24-2019 at 09:26 AM.
    2018 Blue Wolverine X4
    First Wolverine X4 to break the 60 MPH barrier
    Over 6000 miles and 425 hours
    Hunterworks prototype sheave with easy cleanout port, 22 gram HV weights
    Weller Racing ECU flash
    HMF Titan Series Quiet slip-on Exhaust
    Walker Evans shocks
    Swiss-cheesed airbox lid
    NGK Laser Iridium spark plugs
    Tinkseal additives
    STI HD beadlocks wearing Tusk Terrabite 27x9x12 tires
    OEM windshield, soft cab, and roof
    OEM skid plates
    OEM rock sliders
    OEM A-arm guards
    OEM cargo box
    Check out the Yamaha X2/X4 FB group: https://www.facebook.com/groups/WolverineX2X4/

  6. #5
    Experienced Piston Yamaha's Avatar
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    If you installed a pipe like an HMF would you have to send your ECU back for another flash?
    wolvymanx4 likes this.
    Wolverine X2 R-Spec SE
    27" Big Horn 2s, SuperATV Flip Windshield, Yamaha Soft Cab, Yamaha Cargo Box, Kolpin 3500# winch w/ synthetic rope, KFI winch mount, UPI Inferno Heater, JBL PRV-175 stereo, Polk 6.5 speakers, Garmin Drive 60 with VV Mapping. Lots of other little things.

  7. #6
    Super Moderator MassiveOverkill's Avatar
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    Good question.
    2018 Blue Wolverine X4
    First Wolverine X4 to break the 60 MPH barrier
    Over 6000 miles and 425 hours
    Hunterworks prototype sheave with easy cleanout port, 22 gram HV weights
    Weller Racing ECU flash
    HMF Titan Series Quiet slip-on Exhaust
    Walker Evans shocks
    Swiss-cheesed airbox lid
    NGK Laser Iridium spark plugs
    Tinkseal additives
    STI HD beadlocks wearing Tusk Terrabite 27x9x12 tires
    OEM windshield, soft cab, and roof
    OEM skid plates
    OEM rock sliders
    OEM A-arm guards
    OEM cargo box
    Check out the Yamaha X2/X4 FB group: https://www.facebook.com/groups/WolverineX2X4/

  8. #7
    Cannon Ball wolvymanx4's Avatar
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    Quote Originally Posted by MassiveOverkill View Post
    1) MassiveOverkill
    2) Weller Racing
    3)
    4)

    Should be more members joining in the near future
    Someones keeping score. LOL.

    I am very excited to here about the ECU flash. I just went to wellerracing.com and checked it out. Here's the link everybody:

    https://www.wellerracing.com/WR-Edit...X4_p_3860.html
    MassiveOverkill likes this.
    2018 X4 Special Edition
    STI HD7 Wheels In Radiant Red
    Gladiator ATR 28X10R14 Tires
    18g HV Weights
    UNI Two Stage Air Filter
    Suntop
    OEM Windshield
    OEM Rear Bumper With Reverse Lights Mod
    Seizmik Strike Mirrors With Red Inserts
    Super ATV Tinted Rear Window
    UTV Tek Sun Visors

  9. #8
    Cannon Ball wolvymanx4's Avatar
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    After reading the web page I am confused about the core charge ( $625 ). If you have to send in your ECU I wonder what this core charge is all about. Probably going to have to call and ask.
    Last edited by wolvymanx4; 10-05-2018 at 11:51 PM.
    2018 X4 Special Edition
    STI HD7 Wheels In Radiant Red
    Gladiator ATR 28X10R14 Tires
    18g HV Weights
    UNI Two Stage Air Filter
    Suntop
    OEM Windshield
    OEM Rear Bumper With Reverse Lights Mod
    Seizmik Strike Mirrors With Red Inserts
    Super ATV Tinted Rear Window
    UTV Tek Sun Visors

  10. #9
    Weekender
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    Quote Originally Posted by wolvymanx4 View Post
    After reading the web page I am confused about the core charge ( $625 ). If you have to send in your ECU I wonder what this core charge is all about. Probably going to have to call and ask.
    It's so you don't have down time. They send you a flashed ECU, you send yours in, or fork out the core charge

  11. #10
    Cannon Ball wolvymanx4's Avatar
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    So I was kind of figuring that but I was thinking that that was an insanely high dollar amount but since my last post I went and looked up the price of a new OEM ECU. Lets just say WOW! $822.75. All makes sense now.
    MassiveOverkill likes this.
    2018 X4 Special Edition
    STI HD7 Wheels In Radiant Red
    Gladiator ATR 28X10R14 Tires
    18g HV Weights
    UNI Two Stage Air Filter
    Suntop
    OEM Windshield
    OEM Rear Bumper With Reverse Lights Mod
    Seizmik Strike Mirrors With Red Inserts
    Super ATV Tinted Rear Window
    UTV Tek Sun Visors

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