This fuel pump assembly works as a genuine OEM replacement, fitting perfectly on Honda FourTrax Rancher 420 (TRX420) models from 2014 to 2021—plus Foreman 500 (TRX500) units built between 2014 and 2019. It lines up exactly with OEM part number 16700-HR3-A21, so you won’t need any extra tweaks to get it to fit right.

It’s tailored to work with standard ATV EFI systems, keeping a steady 43psi pressure and consistent fuel flow every time you use it. That means no more common headaches like engine hesitation, sudden stalling, or tough startups. The assembly plays well with both regular gasoline and E85 ethanol fuel, thanks to chemical-resistant internal parts that stay strong and avoid premature wear.

Built to hold up against rough off-road use, its sealed outer shell keeps internal components safe from water, mud buildup, and flying debris. The full assembly has everything you need included: the pump itself, a fuel strainer, and the sending unit. This makes for a smooth bolt-in installation—no extra adjustments required, just a straightforward setup.