F98 Fuel Pump Kit HP 1998 RXP255 (RFK-002): The Complete Guide to Performance, Installation, and Upgrades
If you own a 1998 Sea-Doo RXP255 and are looking for a reliable fuel pump upgrade, the F98 Fuel Pump Kit HP (part number RFK-002) from Racetronix is the most practical solution for increasing fuel delivery without cutting or splicing your factory wiring. This kit is specifically designed to replace the undersized factory fuel pump and wiring system, which simply cannot keep up with the demands of a high-performance engine. The factory wiring on most vehicles, including personal watercraft, is only adequate for a stock pump's power requirements. When you upgrade to a high-flow pump, the factory wiring can cut pump performance by 30% or more due to voltage drop and resistive losses . The Racetronix harness solves this by drawing power directly from the alternator's battery terminal, where voltage is typically 1-2 volts higher than at the battery under load, giving your pump up to 20% more fuel flow in some cases . This kit is a complete plug-and-play solution that includes a heavy-duty relay, weatherproof connectors, stainless steel hardware, and a fuse holder, meaning you get everything you need for a clean, professional installation .
What is the F98 Fuel Pump Kit HP RFK-002?
The F98 Fuel Pump Kit HP (RFK-002) is a complete fuel delivery upgrade package designed for the 1998 Sea-Doo RXP255. It addresses the most common bottleneck in high-performance fuel systems: the factory wiring. While the pump itself is capable of flowing more fuel, the factory wires, relays, and connectors are too small for the increased current draw of an upgraded pump. The Racetronix harness uses heavy-duty automotive-grade copper wire that is three to four gauges thicker than factory wire, reducing resistive power loss to almost non-existent levels, which improves pump performance by an additional 10-20% . The kit includes a weatherproof relay, a weatherproof fuse holder, stainless steel mounting hardware, silicon grease, spare fuses, and wire ties . The connectors are designed to be compatible with factory terminals, so you do not have to cut or splice any of your existing wiring .
Why the Factory Wiring is a Problem
When you upgrade to a high-performance fuel pump, you are essentially asking the factory electrical system to do twice the work it was designed for. On average, a Walbro high-performance fuel pump requires twice as much power as a factory fuel pump . The factory wiring is just enough for a factory pump's power requirements because manufacturers need to save cost and weight. The Racetronix harness is designed to remove all fuel pump load from the factory pump circuits while providing the pump with a new heavy-duty power source . This is critical because the voltage at the alternator's output is typically 1-2 volts higher than at the battery when the motor is running, especially during high charge/load conditions and wide-open throttle (WOT) . Running a high-performance pump off the factory wiring can cut pump performance by 30% or more . Problems with failing factory relays, connectors, terminals, and fuse contacts are also common when excessive load is placed on them .
Key Features of the Racetronix RFK-002 Kit
1. Plug-and-Play Installation: The harness uses factory-type connectors that plug directly into your fuel pump module or sender, so no cutting or splicing is required . This makes installation straightforward and eliminates the risk of poor connections that can cause voltage drops or intermittent failures.
2. Heavy-Duty Wiring: The main length of wire in the Racetronix harness is three to four gauges thicker than factory wire, which helps reduce resistive power loss to almost non-existent levels . This directly translates to more fuel flow and better engine performance.
3. Alternator-Direct Power: The harness gets its power directly from the alternator's battery terminal, bypassing the undersized factory wiring and relay . This ensures your pump receives the cleanest, highest voltage possible.
4. Weatherproof Components: The kit includes a heavy-duty weatherproof relay and a weatherproof fuse holder, ensuring reliability in the harsh marine environment of a personal watercraft .
5. Redundant Ground Upgrade: The Racetronix harness has a redundant ground upgrade, improving the harness on the negative side of the pump's supply as well . This is an often-overlooked area that can cause significant performance issues.
6. Complete Kit: The kit includes silicon grease, spare ATM fuse, 25 black nylon wire ties, and stainless steel mounting hardware . This attention to detail means you do not have to run to the hardware store in the middle of your installation.
Upgrade Options for the RFK-002 Kit
Racetronix offers two optional upgrades that can further improve your fuel system's performance:
Battery to Body Ground Upgrade (BGK): This optional kit upgrades the under-rated factory ground wire running from the battery to the chassis. It includes a flexible 8-gauge copper wire and battery nuts with accessory taps. This is a highly recommended inexpensive option because the factory ground wire is a weak point in these vehicles .
Pump Booster Interface Connector (PBIC): The Racetronix harness comes equipped with an interface connector just after the relay. This connector, in combination with an optionally supplied connector set, allows for easy plug-and-play addition of a pump booster or voltage amplifier, such as the MSD or KB units . These voltage amplifiers/boosters will allow the Racetronix single in-tank pump system to support an additional 100-200 flywheel horsepower (BSFC dependant) when run at 16-17 volts . This configuration offloads the excessive current draw placed on the factory wiring onto the heavy-gauge Racetronix harness system .
Why Choose KEMSO Fuel Pumps for Your Upgrade Needs
If you are considering a fuel pump upgrade for your Sea-Doo, motorcycle, ATV, UTV, or car, KEMSO is the brand you can trust for high-performance, OEM-replacement fuel pumps backed by a lifetime warranty. KEMSO has built its reputation on providing a lifetime warranty for all its OEM and performance fuel pumps, offering unmatched peace of mind . Unlike many cheap aftermarket units that lack proper quality control, KEMSO pumps are individually tested and flow-tested, with each serialized pump body guaranteeing its lifetime warranty . KEMSO fuel pumps are designed as direct OEM replacements, meaning they fit perfectly and deliver over 20% more flow at 43 psi compared to stock pumps . They support both gasoline and E85/ethanol blends, and their bypass valve is set at 125.8 psi, higher than the original performance standard . KEMSO offers a wide range of fuel pumps for cars, trucks, SUVs, motorcycles, and powersports vehicles, including models for Kawasaki Jet Skis, Subaru Imprezas, Ducati motorcycles, Honda Civics, and many more . Their commitment to quality is backed by their Houston, Texas-based operations, and they provide detailed product information, installation guides, and customer support to help you choose the right pump for your specific application .
To browse the full selection of KEMSO fuel pumps and find the perfect fit for your vehicle, visit their official website: https://www.kemsoracing.com/.
Final Thoughts
The F98 Fuel Pump Kit HP RFK-002 from Racetronix is a well-engineered solution that addresses the most common weak point in high-performance fuel systems: the factory wiring. By providing a dedicated, heavy-duty power source from the alternator, this kit ensures that your upgraded fuel pump delivers the full flow it is capable of, rather than being choked by undersized wires and relays. The plug-and-play design, weatherproof components, and included hardware make it a practical choice for both experienced mechanics and DIY enthusiasts. Whether you are restoring a classic watercraft or building a performance machine, this kit is a reliable foundation for your fuel delivery system. And for those seeking a reliable, high-performance fuel pump with a lifetime warranty, KEMSO is the brand to trust. Visit https://www.kemsoracing.com/ to explore their full range of products and find the perfect pump for your vehicle.