• Sale
  • Regular price $3,699.95
Shipping calculated at checkout.

Snap Logo Lease for as low as $/week Learn More

Gear Down and Go Big
Gear down and go big with performance you didn’t know was possible by upgrading to SuperATV’s 4” GDP Portal Gear Lift on your Honda Pioneer 520. It gives you 4” of lift and helps you take back your torque with a 15% or 30% gear reduction, so no matter where you ride, you’ll be unstoppable. You get your choice of cast or billet aluminum housing and you can opt for dual idler bearings to take strength over the top. Whatever you choose, you’ll soon realize there’s no trail too intimidating when you’re rolling on GDP.

What Is a Dual Idler®?
Perfection takes time. After years of research and development, we’ve made our dual idler gear portals unlike any other. By placing a second idler gear in the portal box, the load gets spread over twice as much surface area for more reliable torque transfer and the strongest gear set you can get. Two idler gears don’t do a thing if they’re not mated perfectly, though. Precision CNC grinding ensures ours do. Our gears are made from the industry’s toughest 9310 steel alloy. Didn’t think dual idlers mattered? With GDP’s quality and experience, they finally do.

Perfect for Any Rider
If you thought mudding was fun, just wait until you try it with a 30% gear reduction on Honda Pioneer 520 portals. With bigger tires and more torque, you’ll chew through the thick mud that used to slow you down. Our 30% gear reduction is great everywhere, but if you want to maintain more top speed on your UTV, go with 15%. It gives you punchy power without sacrificing your top end.

A Gear Reduction That Protects Your Drivetrain
With portal lifts, the gear reduction is placed in the hub instead of in the transmission. This means your drivetrain doesn’t have to work as hard, so those important components will last longer. Of all the benefits of a portal gear lift, reduced stress on your axles, differential, prop shaft, and transmission is definitely at the top of the list.

Strength Through and Through
We’ve spent years studying, manufacturing, and testing portals. So we know what it takes to make or break them. That’s why you won’t find housings or backing plates stronger than what we use for our GDP portals. You get the choice of cast or billet aluminum housings to go with your 5/16” advanced alloy backing plates. No matter what, you get unmatched strength and reliability.
  • Our housings are reinforced for gear retention and optimized for oil flow
  • Advanced steel alloy backing plates are stronger than chromoly
  • Enhance with Portal Blood—gear oil formulated for GDP Portals
  • There are no gimmicks and no vents because vents do more harm than good—we know because we tested them

Advanced Gaskets, Seals, and Bearings
Our portals use:
  • Advanced gaskets and O-rings with excellent oil resistance and low deterioration rates
  • A sealed input gear and double-lipped output seal
  • 100% sealing coverage throughout so you can forget about oil leaks
  • Double-angular contact output bearings to prevent premature wear
  • Roller idler and drive bearings to maintain perfect gear meshing


4” Portal Gear Lift Includes:
(4) Assembled portal hub boxes complete with 9310 gears, seals, output shaft, gaskets, and thrust bearings
(4) Universal hubs and precision-ground stainless steel slotted rotors with lugs
(4) Specialized steel alloy backing plates
(4) Steel caliper mounting plates
(4) Caliper mounting plate shims
(2) Steel steering arms
(8) Bushings
(4) Sleeves
Extended brake lines
All required hardware, including recessed castle nut socket
Steering stop kit


WARNING: This product can impact machine operation. Customer and/or user is responsible for ensuring that this product is compatible with their machine as currently configured, properly installed, and understands any impact this product has or might have on the machine's operation.


  • Available with billet or cast aluminum housing
  • Dual idler gear configuration maximizes strength
  • Cool, quiet, precision ground gears made from 9310 alloy billet steel
  • Increases width by 4 in. per side (8 in. total)
  • 1.5 in. diameter 4340 hardened steel drive shaft
  • Housings use advanced gaskets or O-rings that don’t let anything through
  • Universal hub fits all major bolt patterns
  • Gear reduction reduces stress on your drivetrain
  • Dual idler gear configuration adds a 1” offset
  • Lighter than the competition

Wheel Requirements:

  • 14” or larger wheel required
  • Cannot exceed 5” backspacing
  • Not compatible with dual beadlock wheels
Honda Pioneer 520 Portal Gear Reduction Recommendations
Max Tire Size Required Suspension Setup with 4" Portals
25" Stock
30" High-Clearance 1" Forward Offset A-Arms
If you need help figuring out which gear reduction is right for you, check out our portal gear reduction calculator.
Max tire sizes are measured at full compression and full turn. The given tires sizes are the largest we fit without rubbing. With minor trimming or a small amount of rub, larger tire sizes can be used.

  • Honda Pioneer 520 : 2021+
NOTE: Wheels need to have a center hole of at least 3.25" (82.55mm) or require a 1” wheel spacer.