SuperATV 4in. Portal Gear Lift for Yamaha Viking

SuperATV's GDP 4 Portal Gear Lift for the Yamaha Viking gives you power and performance. Choose from 15% or 30% gear reductions and cast or billet aluminum housings so you can optimize for the kind of riding that you actually do. You can get a 30% gear reduction for big tires and challenging rides or a punchy 15% gear reduction for fast trails. Plus, you can upgrade to a stronger portal by opting for SuperATV dual idler configuration.

What Is a Dual Idler®?

Perfection takes time. 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. Didn't think dual idlers mattered? With GDPs quality and experience, they finally do.

Perfect for All Kinds of Rides

Whether you like rocks, trails, mud, or doing a good days work, a Yamaha Viking portal gear lift makes it better. A 30% gear reduction gives you plenty of punchy torque to turn big tires through mud or over rocks. A 15% gear reduction still boosts your torque a ton while preserving your top-end speed for trails and road riding. No matter what you're doing, there's a GDP Portal setup that can help.

A Gear Reduction That Protects Your Drivetrain

Because SuperATV Yamaha Viking Portals put the gear reduction directly in the hub, your entire drivetrain benefits. Your axles, differential, drive shaft, and transmission all work less and wear less with a portal gear lift. You can put the pedal down and have a blast without wrecking your ride.

Stronger Yamaha Viking Portals By Design

SuperATV housings are well researched and long tested. And you get a choice - go with cast or USA-made, CNC-machined 6061 billet aluminum. They're supported by beefy backing plates made of an advanced steel alloy you won't find in any other portal system. For robust, trail-proven strength, GDP is the only choice.

• SuperATV 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

Advanced Gaskets, Seals, and Bearings

SuperATV 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

Complete the Package with a Frame Stiffener

Yamaha Viking portals and monster tires are fun, but they can place additional stress on your machines frame. To make your suspension bulletproof, don't forget to add a SuperATV Frame Stiffener when you check out!

4in. Portal Gear Lift Fitment

2014-2026

• Yamaha Viking
• Yamaha Viking EPS

2015-2016

• Yamaha Viking VI EPS SE

2015-2026

• Yamaha Viking EPS SE
• Yamaha Viking VI
• Yamaha Viking VI EPS

2016-2026

• Yamaha Viking VI EPS Ranch Edition

2018-2026

• Yamaha Viking EPS Ranch Edition