Staring at two classified ads for classic Polaris Scramblers, you’re stuck. One is a nimble 400, the other a torquey 500. They look similar, they both promise a legendary 4×4 experience, but you know there’s a world of difference hiding under that plastic. Choosing the wrong one could mean frustration on the trail and unexpected hours in the garage.
We get it. You’ve heard the stories—the wicked sound of the 400’s two-stroke versus the grunt of the 500’s four-stroke. It’s a classic off-road dilemma.
Promise yourself you’ll make the right choice. This definitive guide will dissect the polaris scrambler 400 vs 500 debate, piece by piece. We’ll explore the engines, handling, common problems, and maintenance needs of each, giving you the expert insight to pick the perfect quad for your riding style and mechanical comfort level. Let’s get wrenching.
The Heart of the Beast: 2-Stroke 400 vs. 4-Stroke 500
The biggest difference between these two machines is what happens when you thumb the starter or pull the cord. Their engines offer completely different riding experiences, and understanding this is the first step in your decision. The benefits of polaris scrambler 400 vs 500 truly begin right here.
The Scrambler 400’s Two-Stroke Powerband
The Scrambler 400L is powered by a liquid-cooled 378cc two-stroke single-cylinder engine. If you’ve never ridden a two-stroke, you’re in for a treat—or a shock. They are known for their “light-switch” power delivery.
At low RPMs, the engine feels mild. But as you climb the rev range, it hits the “powerband” and explodes with a surge of acceleration. This snappy, aggressive power makes the 400 feel incredibly lively and exciting on open trails and fast fire roads.
- Pros: Lighter engine, simpler design with fewer moving parts, and an exhilarating, high-RPM power hit.
- Cons: Requires either a functioning oil injection system or pre-mixing oil with the gas, produces more smoke and emissions, and lacks significant engine braking.
The Scrambler 500’s Four-Stroke Torque
The Scrambler 500 H.O. uses the legendary 499cc liquid-cooled four-stroke “High Output” engine. This motor is all about usable, predictable power. It delivers strong torque right off the bottom, making it a master of technical terrain.
Instead of a sudden “hit,” the 500 pulls steadily and strongly through its entire RPM range. This makes it easier to manage traction on slippery climbs and in tight, technical sections. It also provides excellent engine braking, which is a huge help on steep descents.
- Pros: Predictable power, fantastic low-end torque, reliable, and offers natural engine braking.
- Cons: Heavier engine, more complex design (valves, camshaft), and requires regular oil changes.
A Complete Polaris Scrambler 400 vs 500 Guide to Chassis and Handling
While the engines are the main event, the way these quads feel on the trail is also shaped by their weight and suspension. This complete polaris scrambler 400 vs 500 guide wouldn’t be finished without covering how they handle the rough stuff.
Weight and Agility
The two-stroke engine in the Scrambler 400 is significantly lighter than the 500’s four-stroke. This translates directly to how the machine feels. The 400 is more flickable and nimble, making it easier to throw around in tight, wooded trails.
The Scrambler 500 carries its extra weight low, which gives it a more planted and stable feel, especially at higher speeds. While not as agile as the 400, its stability can inspire confidence in fast, sweeping turns and on rough terrain.
Suspension and Ride Comfort
Both the 400 and 500 share a similar chassis and suspension design: MacPherson struts up front and a progressive-rate swingarm in the rear. For their time, they offered a plush ride that could soak up trail chatter and handle bigger hits.
However, these are vintage machines. Stock shocks are likely worn out. A common and highly recommended upgrade for both models is a set of modern aftermarket shocks from brands like Elka or Fox. This single modification can transform the handling and comfort of either quad.
Common Problems with Polaris Scrambler 400 vs 500 Models
No used ATV is perfect. Being aware of the common problems with polaris scrambler 400 vs 500 models will help you inspect a potential purchase like a pro and know what you’re getting into.
Scrambler 400 Watch-Outs
The 400’s simplicity is a double-edged sword. It has fewer parts, but the ones it has are critical.
- Oil Injection Failure: This is the number one killer of 400 engines. If the pump fails or a line cracks, the engine gets no oil and seizes catastrophically. Many owners proactively disable the system and switch to pre-mixing fuel at a 40:1 ratio for peace of mind.
- Top-End Wear: Two-strokes wear out pistons and rings faster than four-strokes. A compression test is a must-do before buying. A healthy 400 should have 120 PSI or more.
- Crank Seals: Leaky crank seals can cause air leaks, leading to a lean condition that can burn up the piston. Check for oily residue around the engine’s side covers.
Scrambler 500 Gremlins
The 500 is a workhorse, but it has its own set of known issues you need to check for.
- Camshaft Wear: Early H.O. engines, particularly from 2001-2002, were known for soft camshaft lobes that would wear down, causing a loss of power and ticking noises. Always listen closely to the top end of the engine.
- Starter Bendix: A grinding or whining noise when starting is a classic sign of a failing starter bendix. It’s a common and relatively easy part to replace.
- AWD System: Check that the All-Wheel Drive engages properly. The system relies on electromagnetic coils in the front hubs. Failures are often due to broken wires or faulty hub coils.
Maintenance and Upkeep: A Polaris Scrambler 400 vs 500 Care Guide
Keeping these vintage warriors running strong requires a solid maintenance plan. This polaris scrambler 400 vs 500 care guide outlines the key differences in upkeep. Following these best practices will ensure your Scrambler is always ready for the trail.
Two-Stroke TLC (The 400)
Maintenance on the 400 is frequent but often simple.
- Fuel & Oil: Always use a high-quality two-stroke injection oil or pre-mix oil. Never use regular motor oil. If pre-mixing, be precise with your ratios.
- Spark Plugs: Two-strokes are harder on spark plugs. Keep a spare and a plug wrench with you on every ride. Learn to read the plug’s color to check your jetting.
- Air Filter: A clean air filter is vital. The 400 moves a lot of air, and any dirt that gets past the filter goes straight into the engine.
Four-Stroke Fundamentals (The 500)
The 500 requires less frequent, but more involved, maintenance tasks.
- Oil Changes: Regular engine oil and filter changes are the most important thing you can do. Use a quality oil like Polaris PS-4 Synthetic to protect the engine and transmission.
- Valve Adjustments: The valves need to be checked and adjusted periodically. Tight valves can lead to hard starting and eventually burn up, requiring a costly head rebuild.
- Coolant: Keep an eye on the coolant level and condition. The 500 works hard and needs its cooling system in top shape.
Eco-Friendly and Sustainable Maintenance Practices
Being a responsible off-roader means taking care of the trails and our environment. A few simple, sustainable polaris scrambler 400 vs 500 habits make a big difference.
When performing maintenance, always use a drip pan to catch fluids. Used oil, antifreeze, and filters can be recycled for free at most auto parts stores. This is an easy and impactful eco-friendly polaris scrambler 400 vs 500 practice.
Consider using biodegradable chain lubes and cleaners to minimize your impact. Most importantly, a well-tuned machine with a clean carburetor and fresh spark plug burns cleaner and uses less fuel, which is better for both your wallet and the air we breathe.
How To Choose: Key Polaris Scrambler 400 vs 500 Tips for Buyers
So, which one is for you? Here are some final polaris scrambler 400 vs 500 tips to help you decide. This is how to polaris scrambler 400 vs 500 shopping is done right.
Who Should Buy the Scrambler 400?
The Scrambler 400 is for the rider who craves excitement. If you love the sound, smell, and explosive power of a two-stroke and aren’t afraid of some hands-on maintenance, the 400 is an absolute riot. It’s the perfect machine for fast, flowing trails and for riders who prioritize a lightweight, agile feel.
Who is the Scrambler 500 For?
The Scrambler 500 is the reliable workhorse. It’s for the rider who wants predictable, go-anywhere torque. If you plan on tackling steep hills, technical rock sections, or just want a more relaxed and less maintenance-intensive trail companion, the 500 is the undisputed champ. Its forgiving nature also makes it a better choice for less experienced riders.
Frequently Asked Questions About the Polaris Scrambler 400 vs 500
Is the Scrambler 500 faster than the 400?
It depends on how you define “faster.” The Scrambler 400 often feels faster due to its abrupt powerband and quicker acceleration. However, the Scrambler 500 generally has a higher overall top speed and its usable torque makes it faster in technical, challenging terrain.
Can I still get parts for these older Scramblers?
Absolutely. Both models were incredibly popular, and there is a robust aftermarket. You can find most mechanical parts, from pistons to brake pads, on sites like Rocky Mountain ATV/MC and Partzilla. For cosmetic parts, eBay and ATV forums are your best bet.
Which Scrambler is better for a beginner?
The Scrambler 500 is the better choice for a beginner. Its linear four-stroke power delivery and engine braking are much more forgiving and predictable. The 400’s sudden power hit can easily catch an inexperienced rider by surprise.
What’s the biggest difference in maintenance?
The biggest difference is engine type. The 400 (two-stroke) requires you to constantly manage its oil supply (injection or pre-mix) and involves more frequent checks of spark plugs and top-end components. The 500 (four-stroke) requires periodic engine oil changes and valve clearance adjustments.
Ultimately, the choice between the Polaris Scrambler 400 and 500 comes down to a simple question: Do you want the wild, high-revving thrill of a two-stroke or the dependable, low-end grunt of a four-stroke? Both are incredibly capable and fun 4×4 ATVs that represent a golden era of off-roading.
Do your homework, perform a thorough inspection, and choose the machine that speaks to your soul. No matter which you pick, you’re getting a piece of Polaris history that’s ready to create new memories on the trail.
Now get out there, get dirty, and have a blast. Ride safe!
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