Thinking about buying, wrenching on, or just finally understanding the machine that basically invented the sport UTV market? The 2008 Polaris RZR 800 is an absolute legend. But knowing its factory specs is the first step to keeping this trailblazer alive and kicking for years to come.
You’ve come to the right place. Here at FatBoysOffroad, we’ve seen countless RZR 800s in our shop. We promise this isn’t just another boring list of numbers. This is your complete, no-fluff breakdown of the 2008 polaris rzr 800 specs, packed with real-world tips from our garage to yours.
In this guide, we’ll dive deep into the engine and drivetrain, break down the suspension and chassis, cover the most common problems to watch for, and give you a complete care guide. Let’s get to it.
The Heart of the Beast: A Deep Dive into Engine & Drivetrain Specs
The powertrain is what gives the RZR its soul. Understanding these numbers is critical for maintenance and diagnosing issues. This is more than just data; it’s a guide to your machine’s core.
Engine Specifications
The 2008 RZR 800 is powered by a surprisingly peppy twin-cylinder engine. It’s a workhorse, but it needs proper care to perform its best.
- Engine Type: 4-Stroke, Liquid-Cooled, Twin Cylinder
- Displacement: 760cc High Output (HO)
- Fuel System: Electronic Fuel Injection (EFI)
- Horsepower (Approx.): ~52 HP from the factory
- Valve Train: 4-Valve, Overhead Cam (OHC)
Pro Tip: That EFI system is generally reliable, but a dirty fuel filter or weak fuel pump can cause frustrating starting and running issues. Always check your fuel pressure (spec is 39 PSI +/- 3) if you’re chasing a performance problem.
Transmission & Drivetrain
Polaris’s PVT and On-Demand AWD system set the standard. It’s a simple but effective setup that requires a little attention.
- Transmission: Polaris Variable Transmission (PVT) – Automatic with P/R/N/L/H
- Drive System: On-Demand True AWD/2WD
- Front Differential: Polaris On-Demand Locking Front Differential
- Rear Differential: Locked (Spool)
One of the most important 2008 polaris rzr 800 specs tips we can offer is about the CVT belt. Treat it like a critical wear item. A glazed or worn belt will rob you of power and can leave you stranded. Keep the clutch housing clean and inspect your belt before every major ride.
Suspension, Chassis, and Handling: The Trail-Taming Formula
The RZR 800’s claim to fame was its nimble, 50-inch width and long-travel suspension. It could fit on ATV trails while offering a car-like driving experience. This section of our 2008 polaris rzr 800 specs guide covers what keeps it planted.
Suspension & Shocks
The stock suspension is basic by today’s standards, but it was revolutionary for its time. It’s a dual A-arm setup all around.
- Front Suspension: Dual A-Arm with 9 inches (22.9 cm) of travel
- Rear Suspension: Dual A-Arm, Rolled Independent Rear Suspension (IRS) with 9.5 inches (24.1 cm) of travel
- Stock Shocks: Basic, non-adjustable coil-over shocks
Check your A-arm bushings and ball joints frequently. They are common wear points, and worn-out components will lead to sloppy steering and poor handling.
Brakes, Wheels, and Tires
Stopping power is just as important as horsepower. The RZR uses a simple but effective hydraulic system.
- Brakes: 4-Wheel Hydraulic Disc with Dual-Bore Front Calipers
- Parking Brake: Hand-actuated
- Front Tires (Stock): 25 x 8-12; Maxxis
- Rear Tires (Stock): 25 x 10-12; Maxxis
- Wheels: Stamped Steel
Always use a quality DOT 4 brake fluid when bleeding or topping off the system. Old, contaminated fluid can cause a spongy pedal and reduced braking performance.
Key Dimensions, Capacities, and Trail-Ready Numbers
Knowing your machine’s size and fluid needs is fundamental for everything from trailering it to performing a basic oil change. These are the numbers you’ll reference time and time again.
- Wheelbase: 77 inches (196 cm)
- Overall Vehicle Size (L x W x H): 102 x 50 x 69 inches (259 x 127 x 175.3 cm)
- Ground Clearance: 10 inches (25.4 cm)
- Estimated Dry Weight: 945 lbs (429 kg)
- Fuel Capacity: 7.25 gallons (27.4 L)
- Engine Oil Capacity: 2 quarts (1.9 L) with filter change
- Coolant Capacity: 5.25 quarts (5 L)
- Payload Capacity: 740 lbs (335.6 kg)
- Cargo Box Capacity: 300 lbs (136.1 kg)
- Towing Capacity: 1,500 lbs (680.4 kg)
Common Problems with 2008 Polaris RZR 800 Specs You Can’t Ignore
No machine is perfect, and the first-generation RZR has a few well-known quirks. Being aware of these common problems with 2008 polaris rzr 800 specs can save you a world of headaches and money down the road.
The Dreaded Dust Ingestion
The single biggest flaw of the early RZR 800 is the stock air intake design. It’s positioned poorly and can allow fine dust to bypass the filter, “dusting” the engine. This scores the cylinder walls and destroys compression.
The Fix: At a minimum, meticulously maintain your stock air filter. Grease the sealing rim of the filter to ensure a perfect seal. The best solution is an aftermarket intake system like a Donaldson-style canister filter or a quality snorkel kit.
Drivetrain and Carrier Bearing Wear
The propshaft carrier bearing is a notorious weak point. The factory bearing is unsealed and wears out quickly, causing a significant vibration under your seat. U-joints and wheel bearings are also common wear items.
The Fix: When you feel that vibration, replace the carrier bearing immediately with a quality sealed aftermarket unit. Greasable U-joints are also a fantastic upgrade for longevity.
Electrical Gremlins
The voltage regulator/rectifier is known to fail, which can lead to charging issues or even boil your battery. Bad ground connections can also cause a host of mysterious electrical problems.
The Fix: If you experience charging problems, test the stator and regulator. Many owners preemptively upgrade to a more robust aftermarket regulator. It’s also one of the 2008 polaris rzr 800 specs best practices to periodically clean and tighten your main ground connections.
Your Complete 2008 Polaris RZR 800 Specs Care Guide
Proper maintenance is the key to a long life for any off-road vehicle. Following this 2008 polaris rzr 800 specs care guide will keep your machine reliable and ready for adventure.
Fluid Checks & Changes
Clean fluids are cheap insurance against expensive repairs. Stick to a regular schedule.
- Engine Oil: Check before every ride. Change oil and filter every 25-50 hours, using a quality 0W-40 or 5W-50 synthetic oil like Polaris PS-4.
- Transmission Fluid: Check level periodically. Change every 100 hours with Polaris AGL Synthetic Gearcase Lube.
- Front Differential Fluid: Check level periodically. Change every 100 hours with Polaris Demand Drive Fluid.
- Coolant: Use a 50/50 mix of ethylene glycol-based antifreeze. Check the overflow bottle before each ride.
Sustainable Ownership Best Practices
Part of responsible off-roading is being mindful of our impact. Adopting a few eco-friendly 2008 polaris rzr 800 specs habits makes a big difference.
Fixing oil and coolant leaks promptly not only saves your machine but also protects the trails we love from contamination. Always collect used fluids in a sealed container and take them to an auto parts store or local recycling center for proper disposal. Never dump them on the ground or in the trash.
The Critical Air Filter Check
We’re mentioning it again because it’s that important. After every single dusty ride, pull your air filter. Clean it if it’s reusable (like a K&N or foam filter) or replace it if it’s a paper element. Check the “clean” side of your intake tube for any signs of dust. If you see any, you have a leak that needs to be fixed immediately.
Frequently Asked Questions About the 2008 Polaris RZR 800 Specs
What is the top speed of a 2008 RZR 800?
A stock 2008 RZR 800 in good condition will typically have a top speed of around 55-60 MPH. This can be affected by tire size, clutch condition, and terrain.
What kind of oil does a 2008 RZR 800 take?
The manufacturer recommends a full synthetic 0W-40 or 5W-50 4-stroke engine oil. Polaris PS-4 is the OEM oil, but other high-quality synthetics meeting the spec will work.
Is the 2008 RZR 800 a reliable machine?
Yes, with a big “but.” If the known issues, especially the air intake, are addressed and the machine is maintained properly, the 760cc engine and drivetrain are very reliable. Neglect, however, will lead to costly failures.
What are the best first mods for a 2008 RZR 800?
Before adding power, focus on reliability and safety. The best first mods are: 1) An upgraded air intake/filter system. 2) A quality set of 4 or 5-point harnesses. 3) Better tires suited for your local terrain.
Understanding the 2008 polaris rzr 800 specs is your roadmap to owning, maintaining, and enjoying this iconic side-by-side. It’s a machine that rewards a hands-on owner who pays attention to the details.
Use this guide, listen to your machine, and don’t be afraid to get your hands dirty. Now get out there, wrench safely, and hit the trails!
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