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HMF Titan Series Exhaust for X2/X4

This is a discussion on HMF Titan Series Exhaust for X2/X4 within the Wolverine X2/X4 General Discussion forums, part of the Yamaha Wolverine X2 & X4 847cc SxS category; thanks for responce...

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Thread: HMF Titan Series Exhaust for X2/X4

  1. #21
    Belt Smoker
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    thanks for responce
    MassiveOverkill likes this.

  2. #22
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    Quote Originally Posted by MassiveOverkill View Post
    There's about a 5 HP increase and it shifts your torque curve left so your RPMs actually run a little lower. You can run 1-2 grams heavier on your primary weight with the HMF exhaust\Weller ECU flash. Please note you can't just do the HMF exhaust. You need the ECU flash to retune for it.
    So 5hp increase from the muffler itself or in combination with the tune? I’m looking to do this before next fall along with hopefully a machined sheave if and when hunterworks has it available. Keep my 18g weights with the 28’s or go up to 19/20g?
    Wolverine X4 SE | 28x10-12 studded Maxxis Bighorn 2.0 (winter) | 27x9-12/27x12-12 Maxxis Bighorn on OEM wheels (summer) | OEM heater | OEM rear storage box | OEM A-Arm guards | OEM hardcoat windshield | OEM hard roof | Boss audio head unit and speakers | 20” black oak light bar | Front and rear winch | Weller Racing Tune | JBS Machined Sheave with 20g OD Weight’s | assault mirrors | SxS enclosures soft cab | SuperATV Rear Windshield | Walker Evans Shocks

  3. #23
    Super Moderator MassiveOverkill's Avatar
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    Quote Originally Posted by Alex View Post
    So 5hp increase from the muffler itself or in combination with the tune? I’m looking to do this before next fall along with hopefully a machined sheave if and when hunterworks has it available. Keep my 18g weights with the 28’s or go up to 19/20g?
    The combo. If you're happy with 18 gram now, with exhaust you'll probably want to step up to 19 or 21. I have 27" tires now and I'm using 22 gram. Snow is melting and I'll be able to do more testing myself.
    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/

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  5. #24
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    Quote Originally Posted by MassiveOverkill View Post
    The combo. If you're happy with 18 gram now, with exhaust you'll probably want to step up to 19 or 21. I have 27" tires now and I'm using 22 gram. Snow is melting and I'll be able to do more testing myself.
    i'll wait till you find the combo that you're happy with and then do it myself - i'm pretty darn happy with the 18G weights and the 28's currently but you know, more power and a little more top end would always be welcome. I roll with a few guys with slightly faster machines and we do some dirt roads that i'd like to be able to maintain 50-52mph without being at the absolute top end of the machine.
    Wolverine X4 SE | 28x10-12 studded Maxxis Bighorn 2.0 (winter) | 27x9-12/27x12-12 Maxxis Bighorn on OEM wheels (summer) | OEM heater | OEM rear storage box | OEM A-Arm guards | OEM hardcoat windshield | OEM hard roof | Boss audio head unit and speakers | 20” black oak light bar | Front and rear winch | Weller Racing Tune | JBS Machined Sheave with 20g OD Weight’s | assault mirrors | SxS enclosures soft cab | SuperATV Rear Windshield | Walker Evans Shocks

  6. #25
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    Quote Originally Posted by Alex View Post
    i'll wait till you find the combo that you're happy with and then do it myself - i'm pretty darn happy with the 18G weights and the 28's currently but you know, more power and a little more top end would always be welcome. I roll with a few guys with slightly faster machines and we do some dirt roads that i'd like to be able to maintain 50-52mph without being at the absolute top end of the machine.
    I'm in the same boat! most of my friends have turbo machines and I'm at the edge of dumping this thing for something more power or can atleast cruise at 50..... I love the short wheel base for a 4 seater, but it flat out does not go fast enough or have enough power at mid to higher speeds. it would be nice to comfortably cruise at low to mid 50's. I love the machine except for riding a little rough and not being able to have a decent cruise on roads.
    Tsckey likes this.

  7. #26
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    I've been watching some YouTube vids that show some of the amazing trail capabilities of the Wolverines. There is ample power to pull off some impressive feats. Just the same I wish Yamaha had come a little closer to the 100hp/liter formula and taller gearing so that a stock machine could reach the 60s and cruise in the 50s. I don't being outrun by my wifes KQ 500. But, things being what they are, a reflash, new exhaust, and clutch work seems the only solution.
    Tsckey

    2019 Wolverine X2 R-Spec SE
    Bighorn 2.0 28x10x12 all around
    Super ATV winch mount, Half windshield, and Mirrors
    Champion winch
    Kolpin Highrise Snowplow, 66" blade, plus Power Angle
    PRP 4.3 shoulder harness

  8. #27
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    The X2/X4 is ridiculously over geared. The wet clutch doesn't help efficiency either. The new engine was designed with torque in mind, not HP. It's a stroker engine compared to the 708 cc it replaced. The secondary spring is designed for maximum torque. It could be compared to a truck shock spring. The good news is with a machined sheave 55-58 MPH cruising shouldn't be a problem.
    Budro2 likes this.
    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/

  9. #28
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    If speed was something one wanted , the new Honda Talon would be my choice , sadly too wide for here with narrow trails but so far the x4 has been good, seats suck , but other than that been fine

  10. #29
    Super Moderator MassiveOverkill's Avatar
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    HMF noise level while trail riding

    Tsckey likes this.
    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/

  11. #30
    Super Moderator MassiveOverkill's Avatar
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    Todd (Hunterworks) has tested the HMF exhaust on his test X2 with 18 gram weights and 28" tires to test the claims that the exhaust/Weller ECU flash causes a performance loss and he lost nothing but stated it did feel peppier. So if you install the HMF/Weller ECU flash and you're losing performance, it's time to look at something else for your performance loss.
    Hunterworks likes this.
    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/

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