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Description
Portals are geared for all, and that means we’re not putting anyone in a box. Choose a 15% or a 30% gear reduction to match your ride style. Love going big and going deep? Get 30% gear reduction for maximum torque and bigger tires. Prefer trail riding? Get a 15% gear reduction. Need ultimate strength? Opt for our dual idler configuration. The choice is yours. Ride your way wherever you want. Let GDP take you where no one else can go.
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 All Kinds of Rides
Love mud? The deeper you go, the more you’ll realize how much torque a 30% portal gear reduction really gives you. Plus that extra ground clearance will keep you from getting swamped. Portals plus mud just makes sense. For trails, desert, and dunes, check out our 15% gear reduction that maintains a higher top speed while still giving you punchy torque.
A Gear Reduction That Protects Your Drivetrain
Portals have their gear reduction right in the hub. That makes this gear reduction reduce the stress on your axles, differential, Prop shaft, and transmission. You can ride harder than stock and cause less wear. It’s a win-win, and a recipe for fun.
Stronger Housings by Design
You think you can find better housings that GDP housings? Think again. Our housings are stronger by design. We know what makes a housing break and why. That’s why whether you choose cast or USA-made 6061 billet aluminum with a dead sexy CNC-machined finish, you’re getting a kick-ass housing with unmatched strength and reliability. Plus, they’re supported by our unstoppable backing plates made with an advanced steel alloy.
- 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
Complete the Package with a Frame Stiffener
Portals and monster tires are fun, but they can place additional stress on your machine’s frame. To make your suspension bulletproof, don’t forget to add a SuperATV Frame Stiffener when you check out!
Technical Specifications
- MFG. Part Number PGH-1-21-151
Vehicle Information
Polaris Sportsman 550 ATV (2009-2014)
The Polaris Sportsman 550, produced from 2009 to 2014, is a robust and versatile ATV. It was equipped with a 549cc liquid-cooled, 4-stroke SOHC single-cylinder engine with Electronic Fuel Injection (EFI), generating approximately 42 horsepower (42.2 HP according to some sources). This reliable engine ensured smooth throttle response and low emissions, making the Sportsman 550 a popular choice for both work and recreation. During its production, the Sportsman 550 underwent significant evolutions. As early as 2009, the "XP chassis" was introduced, enhancing stability and handling. Electronic Power Steering (EPS) also became an option. In 2011, updates included improved splash protection, a 5.4 kg weight reduction, and a tougher, grippier seat. The EPS system was refined in 2012 to provide increased assistance at low speeds. These updates continuously improved the riding experience. Q: Is my Sportsman 550 compatible with these parts?
R: To ensure compatibility, please use our year and model selector at the top of the page.
Maintenance
| Component | Interval | Details |
| Engine Oil and Oil Filter | Break-in: 20-25 hours or 1 month or 800 km. Regular: 50 hours or 6 months or 1,600 km. | Replace filter with every oil change. Polaris PS-4 Plus synthetic oil recommended. |
| Air Filter | Inspection/Cleaning: Daily or before each ride. Replacement: As needed (approximately 9,600 km or 36 months). | Clean more frequently in dusty conditions. |
| Drive Belt | Inspection: 50 hours or 6 months or 800 km. Replacement: As needed (approximately 1,600 km). | Check for wear (cracks, fraying) and tension. |
| Spark Plug | Inspection/Replacement: 100 hours or 12 months or 1,600 km. | Check for carbon buildup or electrode erosion. |
| Coolant | Level Check: Daily. Inspection: 50 hours or 6 months or 1,600 km. Complete Flush: Every 5 years. | Maintain level between min/max. Use Polaris Antifreeze 50/50 Premix. |