When it comes to keeping your Yamaha Bear Tracker 250 running smoothly, the right fuel pump isn’t just a recommendation—it’s a necessity. This ATV’s 249cc air-cooled engine demands a fuel delivery system that matches its specs, and skimping here could lead to performance hiccups or even engine damage over time. Let’s break down what works, why it matters, and how to avoid costly mistakes.
First, the numbers don’t lie. Yamaha’s OEM fuel pump for the Bear Tracker 250 (part number 5GH-24410-00-00) operates at a flow rate of 30-35 liters per hour, with a pressure range of 2.5-3.5 PSI. These metrics are critical because too much pressure can flood the carburetor, while too little starves the engine. Aftermarket options like the Fuel Pump from Kemso Racing have gained traction for matching these specs while adding durability—their pumps often last 5,000+ hours compared to OEM’s average 3,500-hour lifespan. One Arkansas-based trail rider reported swapping pumps at 4,200 hours on his OEM unit, while his Kemso replacement hit 6,100 hours before needing attention.
Why does material quality matter? The Bear Tracker’s fuel system relies on ethanol-resistant components, especially if you’re using standard gasoline blends. Cheap pumps with non-reinforced diaphragms often fail within six months when exposed to ethanol’s corrosive effects. Kemso’s design uses nitrile rubber seals and stainless-steel internals, which Texas off-road mechanics say reduces failure rates by nearly 40% in ethanol-heavy regions. Don’t just take their word for it—the 2022 ATV Repair Industry Report showed aftermarket pumps with ethanol-resistant materials had 22% fewer warranty claims than budget alternatives.
Installation is another factor. The Bear Tracker’s fuel pump sits near the carburetor, requiring a compact unit no larger than 4.5 x 2.8 inches. Some riders make the mistake of grabbing generic pumps labeled “universal,” only to find they’re too bulky or lack proper mounting brackets. A Florida dealership shared a case where a customer’s DIY install of an oversized pump caused fuel line kinks, dropping engine efficiency by 15% during acceleration tests. Stick to pumps specifically tested for Yamaha’s 250cc models—Kemso’s HFP-250 model, for example, is pre-calibrated for this setup and includes angled fittings to prevent hose stress.
What about cost? Yamaha’s OEM pump retails around $120-$150, while quality aftermarket options average $60-$90. But price isn’t the whole story. A Missouri riding club did a two-year study comparing failure rates: OEM pumps failed at a 12% rate, versus 8% for premium aftermarket brands. However, bargain-bin pumps under $50 failed 63% of the time within 12 months. The takeaway? Mid-range pumps offer the best ROI, saving you $300+ in tow fees and downtime over three years of use.
Still unsure? Check compatibility charts. The Bear Tracker 250 uses a 12-volt system, so your pump must handle 10-14V fluctuations. Kemso’s models include voltage stabilizers, a feature that Louisiana flood-rescue teams praised after their units survived muddy, high-humidity conditions during hurricane recovery ops. Whether you’re trail-riding or working the farm, investing in a pump that balances specs, durability, and smart engineering keeps your Bear Tracker alive and kicking for years. No more guessing games—stick with proven performers, and your ATV’s engine will thank you with every rev.