Installing a New Fuel Line on Your 2013 Honda TRX500 Rubicon 4x4
Shop parts for a 2013 Honda TRX500 Rubicon 4X4 ATV.
The Evidence a Hose Is Ready for Retirement
Start with an honest inspection rather than a parts order. Get the 2013 Rubicon on level ground, pull the seat, and put your hands on the hose while the engine is cold. What you are hunting for is any loss of flexibility: fine cracks that spread open as you bend the line, a chalky gray outer skin, a stretch that has gone rigid, or a soft, swollen patch right where the hose meets a barb. Dirt caked into a ring around a clamp is another dead giveaway, since it only builds up where fuel has been seeping and drying repeatedly.
Then step back and consider the bigger picture. A gasoline puddle beneath the frame is conclusive, but on an injected Rubicon the more common early symptom is a smell with no visible source, because pressurized fuel escaping a pinhole tends to atomize before it lands. Add fuel starvation to the checklist as well — bogging when you crack the throttle, hesitation while pulling a load, and a lean, hollow feel at higher rpm all fit a hose that has narrowed internally or is shedding liner material toward the injector.
What This Machine Actually Uses
The 2013 Rubicon is fuel injected, with an electric pump mounted inside the tank feeding the 499cc single through a pressurized line. That rules out the shortcut a carbureted quad gives you: there is no petcock to close and no float bowl drain to empty the downstream side. Instead you cut power to the pump and run the engine dry to bleed the pressure off. Check the tank connection before ordering hardware too, since injected machines sometimes use a self–locking quick–connect coupler in place of a conventional hose clamp.
Getting Set Up Safely
- Injection–rated fuel hose in the stock inside diameter, cut long and trimmed to match
- New clamps in the original style, plus a quick–disconnect release tool if the tank fitting is a coupler
- Line–clamping pliers to close off low–pressure sections, filling the role the missing fuel valve would play
- Gloves, eye protection, and plenty of rags
- A drain pan and a sealed container rated for gasoline
- Sockets, a stubby flat blade driver, and a fresh utility blade
The safety issue worth stating plainly is vapor behavior. Gasoline fumes are heavier than air, so they sink to floor level and spread outward until they meet an ignition source, and the offenders are usually appliances running quietly in the background: a furnace, a water heater pilot, a portable heater. Work outdoors or with the door fully raised, shut those down before you start, and keep an extinguisher on the floor where you can reach it while kneeling. Keep gloves on throughout, because repeated fuel contact strips skin.
Bleeding Pressure and Removing the Old Hose
Remove the fuel pump fuse or relay, then start the engine and let it run until it dies. Turn the key off and disconnect the negative battery cable so nothing can restart the pump while your hands are in the fuel path. With the seat and tank plastics off, follow the hose from the tank outlet all the way to the throttle body and note each clip along the run.
Slide the drain pan into position and cover each fitting with a rag before opening it — the hose still holds fuel after the pressure is bled off. Move clamps well back along the rubber before you disturb a joint. A quick–connect coupler releases with its tabs compressed evenly and the fitting pulled straight off in line with the barb; prying at an angle is how a hardened plastic collar snaps. Where varnish has bonded the hose to a fitting, break the seal with a gentle quarter–turn twist rather than a hard pull, and slit the hose lengthwise with a blade if it still refuses to release.
Take note of the routing while it is intact. Being a 4x4, this Rubicon carries a front differential and the extra frame structure that goes with it, so the hose threads past clearance points a two–wheel–drive machine would not have. Photograph every clip before the last retainer comes free.
Fitting the Replacement and Proving the Repair
Cut the new hose to the same length as the old one. Extra hose rubs against a frame tube or wanders toward the exhaust, while a short piece pulls at both fittings continuously. Press each end fully onto its barb until it seats, and install it completely dry. Grease, oil, and silicone have no place on a fuel fitting; a lubricated sealing surface is precisely what allows pressurized fuel to work its way out from under a clamp. If the hose is stiff, dip the end in hot water for a few seconds and try again.
Set new clamps just behind the raised bead on each fitting and tighten evenly to snug, stopping short of deforming the rubber. If the tank end is a self–locking quick–connect, push until it clicks and confirm the latch with a firm tug rather than adding a clamp. Reseat the hose in its factory clips, clear of the front driveline and hot exhaust.
Now prove the work. Reinstall the pump fuse, Reconnect the battery, and cycle the key on and off five or six times without cranking so the pump pressurizes the fresh line each time. Inspect both joints while the area is still dry, wipe them with a light–colored rag, then start the engine and look again at idle for beading or a widening dark ring. Let it idle several minutes, take a slow lap around the yard, and give both connections one final check before the plastics go back on. If flow still feels soft with a leak–free hose installed, note that the fuel filter on this Rubicon lives inside the tank as part of the pump assembly rather than out on the visible line, which makes that module the next thing to examine.
What Shortened the Old Line's Life
Worth understanding so you can judge the next one on age instead of luck. Fuel hose loses the plasticizers that keep it flexible over the years, and heat cycling from the engine plus constant chassis vibration turn that stiffened wall into a cracked wall. Dry, sun–exposed climates accelerate the hardening measurably, since low humidity pulls flexibility straight out of the outer surface.
Simultaneously, ethanol–blended pump gas works on the inner liner. Fuel left standing in the line between rides gives the alcohol time to absorb moisture and break the liner down, sometimes leaving gum or varnish behind. Between the two, an original hose on a machine of this age is living on borrowed time whether it has leaked yet or not.
Related Shopping Categories
Shop Fuel Lines for a 2013 Honda TRX500 Rubicon 4X4 ATV.
Shop Fuel Line Clamps for a 2013 Honda TRX500 Rubicon 4X4 ATV.
Shop Petcocks for a 2013 Honda TRX500 Rubicon 4X4 ATV.
Shop Fuel Filters for a 2013 Honda TRX500 Rubicon 4X4 ATV.
Shop Fuel Stabilizer for a 2013 Honda TRX500 Rubicon 4X4 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.