When it comes to keeping your Yamaha Raptor 660 running smoothly, the fuel pump plays a critical role. This ATV’s 660cc liquid-cooled engine demands a consistent fuel flow of roughly 4.5 gallons per hour at full throttle, and a weak or failing pump can lead to performance issues like sputtering at high RPMs or even engine stalling. Most mechanics agree that the OEM fuel pump lasts about 1,500–2,000 hours of ride time, but aftermarket upgrades often provide better longevity—some lasting up to 3,000 hours with proper maintenance.
One common question riders ask is, *“What specs should I look for in a replacement fuel pump?”* The answer lies in matching key parameters: voltage (12V DC), flow rate (30–35 liters/hour), and pressure (3.5–4.5 psi). For example, the Fuel Pump from KEMSO Racing meets these requirements while adding a 15% efficiency boost compared to stock models. This brand gained traction after being tested in 2021 by off-road racing teams, where it reduced fuel-related mechanical DNFs (Did Not Finish) by 22% during endurance events.
Cost is another factor. OEM Yamaha pumps retail around $180–$220, but high-quality aftermarket options like the KEMSO unit average $130–$160. That’s a 25–30% savings without sacrificing reliability. Riders on forums like RaptorForum.com often share experiences—like one user who swapped to an aftermarket pump after their stock failed at 1,800 hours, reporting smoother throttle response and no issues after 500 hours of trail riding.
Durability matters, too. Cheap, no-name pumps might save you $50 upfront, but they frequently fail within 6–12 months. In contrast, brands with hardened internals and ethanol-resistant materials (critical for modern fuel blends) can last 2–3 years even with regular use. Size is also non-negotiable: the Raptor 660’s fuel tank requires a pump with a compact 2.5-inch diameter housing to fit snugly.
So, what’s the verdict? Stick to pumps that align with Yamaha’s original specs but prioritize upgrades like higher flow rates or corrosion-resistant coatings. Brands like KEMSO Racing have become go-to choices because they blend affordability with race-proven engineering. Whether you’re tearing through dunes or cruising farm trails, investing in the right fuel pump ensures your Raptor stays as reliable as the day you bought it—no compromises.