There’s a quiet shift happening in the performance PWC world—and it’s not coming from the engines.
A post from GreenHulk PWC Performance Store is putting a spotlight on what it sees as the next bottleneck in the latest Kawasaki Ultra 310 models: fuel delivery. Alongside that claim, the retailer is pointing to a solution—a higher-capacity fuel pump upgrade from Kawi Performance designed to address inconsistent fuel supply under boost.
That’s a bold claim, especially when you’re talking about one of the most powerful production watercraft on the market. But it also points to something bigger: modern PWCs aren’t running out of engine—they’re starting to run into the limits of the systems that support them.
At the center of the discussion is fuel supply under boost. Supercharged engines rely on a steady, consistent flow of fuel to maintain safe air-to-fuel ratios, especially under heavy load and high RPM. When that supply falls short, even momentarily, the consequences can escalate quickly. Lean conditions introduce excess heat, increase the risk of detonation, and in worst-case scenarios, can lead to serious engine damage.
That’s the concern being raised here. As riders begin to push the Ultra 310 platform further—with added boost, airflow modifications, and tuning—the factory fuel system may not always keep pace.
It’s not a new concept in performance tuning. More power almost always demands more support. But what’s notable is how quickly that conversation has shifted into the current generation of machines. Not long ago, discussions around “weak points” were tied to older platforms and well-documented issues. Today, it’s less about fixing known flaws—and more about identifying the next bottleneck as performance ceilings continue to rise.
In this case, that bottleneck appears to be fuel volume and pressure stability under sustained demand.
GreenHulk’s solution is a higher-capacity fuel pump and upgraded supporting components designed to maintain consistent delivery across the powerband. While positioned as a performance upgrade, it’s just as much about reliability—ensuring the engine receives what it needs when it needs it.
For stock riders, this likely isn’t something that demands immediate attention. But for those stepping into the world of modifications, it’s a reminder of how tightly balanced modern engines have become.
The power is already there.
The question now is whether everything around it can keep up.
Read the full release below:
GreenHulk PWC Performance Store
Your fuel system is the limiting factor on the 2022 and newer Kawasaki Ultra 310. Not the engine. The Kawi Performance Kawasaki 2022+ Ultra 310 Fuel Pump Mod Kit is designed to correct one of the most common and dangerous issues on these skis, inconsistent fuel supply under boost.
The factory fuel pump simply cannot keep up with the demands of a supercharged engine, especially once you begin adding performance upgrades. When fuel delivery falls short, the engine runs lean. Lean conditions create excessive heat, detonation, and can quickly lead to serious engine damage or complete failure.This kit is built to eliminate that problem entirely.
At the core is a high flow DW fuel pump rated at 165 liters per hour at 40 PSI. This provides a substantial increase in fuel volume compared to stock, ensuring the engine receives consistent fuel supply even under heavy load and high RPM.
The system is paired with an oversized fuel pressure regulator that stabilizes fuel pressure and maintains proper delivery across the entire powerband. This is critical for keeping air to fuel ratios safe and consistent when the engine is under boost.
The upgraded fuel pump housing directly replaces the factory components and is engineered to support the larger pump. It includes an extended fuel level float arm to maintain accurate fuel readings, along with an upgraded fuel filter to improve flow and long term reliability.
Every component in this kit is designed with durability and performance in mind. The result is a fuel system that can properly support both stock and modified setups without the risk of starvation.
This is not just a performance upgrade. It is a reliability upgrade and a form of insurance for your engine.
If you are running a modified Ultra 310 or plan to increase boost, RPM, or airflow in any way, this upgrade becomes essential. It ensures your fuel system can match the demands of your engine so you can ride hard without worrying about running lean.
Fits 2022 and newer Ultra 310 models, 2020 and newer STX 160, and 2023 and newer Ultra 160.
