Replacing the Fuel Hose on a 2017 Honda TRX500 Rubicon 4x4 DCT (FA5)
Shop parts for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
A Rubicon engine will outlast several fuel hoses, and that is the whole reason this job matters. The line is inexpensive, the labor is modest, and a failure leaves you either stranded or dripping gasoline onto a hot engine. On a 2017 TRX500 Rubicon 4x4 DCT you are dealing with a fuel-injected machine, so the procedure starts with pressure relief rather than closing a valve.
Why the Hose Fails Long Before the Engine Does
Rubber compounds slowly surrender the plasticizers that make them flexible. As the material dries, the hose grows stiff and chalky, and every heat cycle plus every bit of frame flex opens tiny fissures — usually right where the hose curves into a fitting. Dry climates push this along, because arid air pulls moisture out of the hose from the outside. From the inside, ethanol-blended pump gas draws in water and degrades the liner, softening the bore and sometimes shedding fine material into the fuel stream. Damage accumulates fastest when fuel sits stagnant in the line for months, meaning a low-hour Rubicon that spends winters parked can need a hose as much as a hard-worked one.
Injection Means No Shutoff Valve
Look under the tank on this Rubicon and you will not find a petcock. An electric pump inside the tank pressurizes a reinforced supply hose that runs to the throttle body, and that pressure remains after the engine is off. Two practical rules follow: bleed the system before you disconnect anything, and use hose rated for injection service rather than soft carburetor tubing. The DCT transmission has no bearing on the fuel path, but the 4x4 driveline does clutter the chassis, so the hose passes clips and clearance points that need to be respected on reassembly.
Field Signs of a Leaking or Collapsing Line
Any of these findings justifies a closer look:
- Fuel pooled beneath the machine or a wet trail down the frame after it has been parked
- A gasoline smell around the quad that hangs on well past shutdown
- Hairline cracking, a glazed sheen, or a hardened length that does not spring back when pinched
- Bogging under load, throttle hesitation, or lean running that mimics a nearly empty tank
- A ring of caked dirt at a fitting where seeping fuel has dried repeatedly
Keep in mind that a pressure-side pinhole often atomizes rather than drips. Smell is a legitimate diagnostic on this system even when the floor stays dry.
Shopping List and Shop Ventilation
Have everything staged before the first connection comes apart:
- Nitrile or rubber gloves plus eye protection
- A sealed fuel-rated container for drained gas and plenty of rags
- Replacement hose rated for injection pressure in the original inside diameter
- New clamps in the right style, and a quick-disconnect release tool if the tank fitting locks
- Line-clamping pliers to pinch a low-pressure section closed in the absence of a petcock
- A socket set and small flat-blade driver for seat, rack, and panel hardware
Gasoline vapor is heavier than air, so it collects along the floor where an overhead window does nothing for you. Open the garage door completely or work outside, kill any pilot light in the space, keep spark-producing tools away, and stage a fire extinguisher within arm reach.
Pulling the Tired Hose
Remove the pump fuse or relay, then crank the starter briefly until the engine stalls to dump the pressure. Turn the key off and disconnect the negative battery lead. Take the seat off along with any panel covering the tank connection, slide your drain pan underneath, and lay a rag over the first joint, since a bled hose still carries fuel.
Work clamps well back along the hose before disturbing anything. A quick-connect coupler needs both tabs pressed squarely and a straight pull — prying at an angle cracks plastic that has been weathering for years. If varnish has fused the hose to a barb, break it loose with a gentle twist, or split the hose lengthwise with a razor and strip it away rather than damaging the fitting. Document the routing before it is fully out. On a 4x4 like this one, the hose navigates around front differential hardware and additional frame structure, and putting it back on a slightly different path is how new chafe points get born.
Seating and Securing the New Line
Measure the replacement against the old hose and cut it to the same length. Slack lets the hose wander into hot or moving components, while a short piece keeps tension on both fittings. Push each end fully onto its barb until it bottoms against the shoulder, and do it dry. Grease, oil, and silicone all give pressurized fuel a path to creep along the sealing surface, so nothing goes on the fittings. Thirty seconds in hot water is the honest way to soften a stiff end.
Place new clamps just behind the bead on each fitting and snug them evenly. Where the tank side uses a self-locking quick-connect, push it home until you hear the click, then pull to confirm engagement; that connection is designed to hold without a clamp. Return the hose to its original guides before the panels go back on.
Verifying No Weeps Remain
Reinstall the pump fuse, Reconnect the battery, and cycle the key on and off several times without cranking. Each cycle brings the line to full pressure so you can inspect both joints while the area is still dry. Start the engine afterward, watch the fittings at idle with a clean rag for a few minutes, and check again following a slow test loop.
One detail that trips owners up: on this injected Rubicon the fuel filter lives inside the tank as part of the pump assembly, not inline where you can reach it. A new hose eliminates leaks and cracks but cannot clear a restriction, so persistent fuel starvation after a clean install points at the in-tank module.
Related Shopping Categories
Shop Fuel Lines for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
Shop Fuel Line Clamps for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
Shop Petcocks for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
Shop Fuel Filters for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
Shop Fuel Stabilizer for a 2017 Honda TRX500 Rubicon 4X4 DCT (FA5) ATV.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your ATV's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.