Why Your Side-by-Side Is Losing Power
Power loss is one of the most frustrating issues UTV owners face—whether you’re tackling tough trails, hauling gear for work, or just cruising with friends. At REV6, we’ve rebuilt thousands of engines and transmissions across Polaris, Can-Am, Kawasaki, and more. We’ve seen firsthand what causes poor performance—and how to fix it. Below, we break down the most common causes of power loss and show you how to reclaim performance through engineered upgrades and expert tuning.
Common Causes of Power Loss in Your UTV
Dirty or Clogged Air Filter
A restricted air filter is one of the most overlooked reasons your side-by-side might be struggling. Engines need a consistent flow of clean air to burn fuel efficiently. When the filter is packed with dirt or debris, airflow is cut off—causing sluggish acceleration and lower top-end power.
Pro Tip: Clean or replace your air filter every 20–50 hours of use, especially if you ride in sand, mud, or dusty desert terrain.
Fuel System Problems
Contaminated fuel, old gas, a failing fuel pump, or clogged fuel injectors can all reduce your engine’s performance. If your UTV sputters, hesitates under throttle, or struggles to start, your fuel delivery system may be the culprit.
Experience-Based Insight: We see this often in machines stored over the winter or run on ethanol-blended fuel. Upgrading to a high-flow fuel pump and cleaning your injectors can make a big difference.
Spark, Timing, or Compression Issues
Worn spark plugs, faulty ignition coils, or weak compression from worn-out valves and rings can all cause power loss. If your UTV feels like it’s “missing” under load, it’s time for a full inspection.
Trustworthy Fix: At REV6, we remanufacture engines to better-than-OEM specs using forged internals and CNC machining. If your engine has lost compression or timing is off, it might be time to consider a rebuild.
Proven UTV Upgrades to Boost Power
Upgrade Your Exhaust System for Better Flow
Replacing your stock exhaust with a high-flow aftermarket system helps your engine expel exhaust gases more efficiently. This reduces backpressure and increases available horsepower. Riders will notice faster throttle response and a more aggressive tone.
Real-World Tip: Pair an upgraded exhaust with a tuned ECU or clutch kit to unlock its full potential.
Install an Aftermarket Clutch Kit
A quality clutch kit optimizes how your engine transfers power to the wheels. This means quicker acceleration, smoother gear engagement, and better low-end torque—especially when climbing hills or hauling loads.
DIY-Friendly Upgrade: Most clutch kits can be installed with basic tools and make an immediate difference on trail rides or job sites.
Turbocharge or Supercharge for Maximum Horsepower
If you’re looking for maximum power, a turbo or supercharger kit can add up to 50% more horsepower. However, not all drivetrains can handle that kind of stress.
Expert Guidance Matters: The team at REV6 can help you select the ideal forced-induction system tailored to your machine, riding style, and long-term objectives.
Final Thoughts: Ride Stronger, Ride Smarter
If your side-by-side is underperforming, it’s not just annoying—it’s a warning sign. Whether it’s a clogged air filter or deeper engine wear, catching the issue early can save you time, money, and downtime.
At REV6, we do more than sell parts. We remanufacture engines and transmissions using precision CNC machining and real-world knowledge. Every build is backed by our 1-year warranty and optional 2-year no-fault warranty.
Need help diagnosing power loss or choosing the right upgrade? Contact our team today or visit our FAQ page for quick answers. Want to learn how to pick the right rebuild kit? Read our Engine Rebuild Kit Guide. If you’re new to our process, our Help Center explains everything from shipping to core returns.
