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Kawasaki STX 160 vs Ultra 310 comparison

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Kawasaki STX 160 vs Ultra 310: Which Jet Ski Is Right for You?

Whether you're a weekend warrior looking for family fun on the water or a seasoned rider chasing adrenaline, Kawasaki has a personal watercraft for you. Two of their most popular models — the Kawasaki STX 160 and the Kawasaki Ultra 310 — represent very different philosophies in PWC design. One is an accessible, value-packed workhorse. The other is a fire-breathing performance machine. Let's break down the differences so you can make the best choice for your riding style.

Overview: Two Very Different Machines

Before diving into the specs, it's important to understand what each jet ski is designed for. The STX 160 is Kawasaki's mid-range touring and recreational model, built for riders who want reliability, comfort, and everyday usability without breaking the bank. The Ultra 310, on the other hand, sits at the very top of the Kawasaki lineup — a supercharged powerhouse that competes directly with top-tier offerings from Sea-Doo and Yamaha in the performance segment.

Engine and Performance

This is where the two models diverge most dramatically. The STX 160 is powered by a naturally aspirated 1,498cc four-cylinder engine producing around 160 horsepower. It's smooth, responsive, and more than enough for recreational riding, towing a tube, or cruising with a passenger. Top speed sits comfortably around 60–62 mph, which is plenty for most riders.

The Ultra 310, however, is in a completely different league. Equipped with a supercharged and intercooled 1,498cc engine, it pumps out a jaw-dropping 310 horsepower, making it one of the most powerful production PWC on the market. Top speeds exceed 67 mph, and the acceleration is nothing short of breathtaking. If you're serious about performance riding, the Ultra 310 leaves virtually no competition standing — including many offerings from Sea-Doo and Yamaha.

Comfort and Features

The STX 160 shines in day-to-day usability. It features a generous three-passenger seat, an ergonomic handlebar design, and a smooth hull that absorbs choppy water well. It's an ideal family personal watercraft. Storage is practical, the fuel capacity is solid, and the overall ride is forgiving enough for beginners yet engaging enough for intermediate riders.

The Ultra 310 LX takes comfort to a premium level with a plush three-person seat, cruise control, a rearview mirror, and an electronic trim system that lets you dial in your ride for different water conditions. It also offers generous storage for longer trips. This is a jet ski you can ride hard all day without fatigue.

Who Should Choose Which Model?

  • Choose the STX 160 if you're a recreational rider, a family looking for a fun and affordable PWC, or someone new to personal watercraft who wants a capable and forgiving machine.
  • Choose the Ultra 310 if you demand top-tier performance, love pushing limits, frequently ride in open ocean conditions, or simply want the best Kawasaki has to offer.

Gear Up for Either Ride with UNLIMITED PWC

No matter which Kawasaki you choose, having the right gear makes all the difference on the water. At UNLIMITED PWC, we carry everything you need to ride safely and in style. Start with a high-quality life vest — essential safety equipment for any PWC rider, regardless of experience level.

For riders who spend long hours on the water or ride in cooler conditions, a premium wetsuit will keep you warm and protected. Don't overlook traction mats either — they dramatically improve grip and control on both the STX 160 and Ultra 310, especially during aggressive riding. Protect your hands with purpose-built PWC gloves, and keep your footing secure with specialized PWC footwear.

If you own an Ultra 310 and want to squeeze even more performance out of that supercharged engine, check out our selection of aftermarket exhaust systems — engineered to enhance power delivery and give your machine an unmistakable sound on the water.

Final Thoughts

The Kawasaki STX 160 and Ultra 310 are both exceptional personal watercraft — they're just built for different riders and different moments. The STX 160 wins on value and versatility, while the Ultra 310 wins on raw, heart-pounding performance. Either way, you're riding a Kawasaki, and that means quality you can trust on the water.

Ready to take your ride to the next level? Explore the full range of PWC parts, accessories, and apparel at UNLIMITED PWC — your trusted global source for everything jet ski.

👉 Shop now at UNLIMITED PWC and gear up for your best season yet.

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Sea-Doo Spark accessories and upgrades guide

Sea-Doo Spark Accessories & Upgrades: The Ultimate Guide for PWC Enthusiasts The Sea-Doo Spark is one of the most popular entry-level personal watercraft on the market today — and for good reason. It's lightweight, affordable, and an absolute blast to ride. But if you've been on the water for a while, you already know that the stock setup leaves plenty of room for improvement. Whether you're looking to boost performance, increase safety, or simply ride in more comfort, the right accessories and upgrades can completely transform your experience on the water. At UNLIMITED PWC, we supply premium PWC parts and apparel to riders around the world — from Sea-Doo and Yamaha fans to die-hard Kawasaki jet ski enthusiasts. In this guide, we break down the best accessories and upgrades for the Sea-Doo Spark, so you can get the most out of every session. Start With Safety: Life Vests and Protection Gear Before you talk about performance upgrades, you need to talk about safety. No matter how experienced a rider you are, wearing a proper life vest is non-negotiable. Modern PWC life jackets are slim, flexible, and designed specifically for the dynamic movements involved in riding a personal watercraft. Look for a vest that offers impact protection, a snug fit, and full range of motion — especially if you're into freestyle or rough water riding. Don't underestimate how quickly conditions can change on the water. A quality life vest is your single most important piece of gear. Ride Longer and Safer with a Quality Wetsuit The Sea-Doo Spark is a sit-down personal watercraft, but you're going to get wet — that's part of the fun. A well-fitted wetsuit keeps you warm in cooler conditions and provides an extra layer of protection against impact and abrasion. Whether you're riding in Japan, Europe, or anywhere else in the world, having the right thermal protection makes your time on the water more comfortable and extends your riding season well into the cooler months. Upgrade Your Grip with Traction Mats One of the most practical and immediate upgrades you can make to your Sea-Doo Spark is replacing the stock deck padding with high-quality traction mats. The factory mats on most jet ski models wear down quickly and provide limited grip when wet. Aftermarket traction mats offer superior grip, better cushioning, and a custom look that sets your craft apart from the rest. Traction mats are especially important for riders who stand on their craft during aggressive riding or who carry passengers. Better grip means better control — simple as that. Protect Your Hands and Feet Your hands and feet take a beating on the water. High-quality PWC gloves improve your grip on the handlebars, reduce vibration fatigue during long rides, and protect your hands from sun exposure and impact. Meanwhile, purpose-built PWC footwear gives you the traction and ankle support you need when boarding, dismounting, or standing on your watercraft at speed. These might seem like small details, but serious riders — whether they're on a Sea-Doo, a Yamaha WaveRunner, or a Kawasaki jet ski — know that the right gear makes a real difference over the course of a full day on the water. Boost Performance with an Exhaust Upgrade Ready to take your Sea-Doo Spark to the next level? An aftermarket exhaust system is one of the most effective performance upgrades available for personal watercraft. A performance exhaust improves airflow, increases throttle response, and can unlock additional horsepower that the stock system holds back. For a lightweight craft like the Spark, even modest power gains translate into a noticeably more exciting ride. Combined with other performance modifications, an exhaust upgrade can transform your Spark from a fun beginner craft into a seriously capable machine. Find Everything You Need at UNLIMITED PWC Whether you're building your Sea-Doo Spark from the ground up or just looking for that one finishing touch, UNLIMITED PWC has you covered. Browse our complete product catalog for the latest accessories, performance parts, and riding gear designed for all major PWC brands including Sea-Doo, Yamaha, and Kawasaki. We're a Japanese brand with a global reach, and our mission is simple: help every rider get more out of their time on the water. Ready to upgrade your ride? Visit UNLIMITED PWC today and discover the difference premium PWC gear can make.

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The 40-year journey that built UNLIMITED PWC

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