How to Bleed & Replace Brake Fluid on a 2017 Honda Rancher 420 4X4 ES (FE1)
Shop parts for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
This MotoSport-exclusive service guide walks you through safely flushing and replacing the brake fluid on a 2017 Honda Rancher 420 4X4 ES (FE1). Follow every step carefully, use the recommended fluid, and observe the model-specific notes at the end so you keep your ATV stopping reliably on trail or jobsite work.
Safety & preparation
- Work in a well-ventilated area on a flat, level surface with the ATV securely parked and engine off.
- Wear eye protection and gloves. Brake fluid is corrosive to paint & plasticswipe spills immediately.
- Have the correct DOT-rated brake fluid on hand: Honda Rancher 420 models use DOT 3. Do not mix DOT 5 silicone with DOT 3/4.
- Gather tools: box/end wrenches (common bleed-nipple size usually 8mm or 10mm), bleeder hose, clear catch bottle, turkey baster or syringe, funnel with filter, clean rags, torque wrench (if re-torquing caliper bolts), jack or blocks to lift wheels if needed.
- Know the bleed sequence: always start with the caliper or wheel farthest from the master cylinder and work to the closest. If you are unsure which is farthest on your machine, treat front passenger side as farthest, then front driver side, then rear (or follow the owner's manual sequence).
Overview of methods
Choose one bleeding method you're comfortable with:
- Two-person pump-and-hold (traditional): one person pumps the lever/pedal, another opens/closes bleeder valves.
- Vacuum/hand-pump bleeder: attaches to bleeder nipple to draw fluid out solo.
- Gravity/fluid-exchange bleed: slow but effective for full fluid change.
Step-by-step: flush & replace brake fluid (recommended full system change)
- Clean reservoir area. Remove the master cylinder reservoir cap and diaphragm. Cover painted surfaces with rags to protect from spills.
- Remove old fluid from the reservoir using a turkey baster or syringe until mostly empty. Don't let debris fall into the reservoir.
- Refill reservoir with fresh DOT 3 fluid to the full mark.
- Start with the wheel/caliper farthest from the master cylinder. Fit clear hose over the bleeder nipple and place the other end into a catch bottle partially filled with fresh fluid to avoid drawing air back in.
- If using two-person method: have your helper slowly depress the brake lever/pedal several times and hold it down. While held, open the bleeder nipple one turn to allow fluid and air to escape into the hose, then close the nipple before your helper releases the lever. Repeat until clear fluid without air bubbles flows, then move to the next wheel in sequence.
- If using vacuum or hand pump: attach the device to the bleeder nipple, operate the pump while keeping the reservoir topped up. Continue until clear, bubble-free fluid exits the hose. Keep reservoir level above the minimum at all times to prevent introducing air.
- After bleeding each caliper, top off the reservoir to the full mark and move to the next caliper following the farthest-to-closest order.
- Once all calipers are bled and the reservoir contains fresh fluid, operate the brake lever/pedal repeatedly to verify firmness. If sponginess persists, repeat the bleeding cycle until the lever/pedal is firm and consistent.
- Clean each bleeder nipple and torque any opened caliper hardware to factory spec if removed. Replace the reservoir diaphragm & cap securely. Wipe all brake fluid residues from painted surfaces and flush with water if contamination occurred.
- Test ride cautiously at low speed in a safe area to confirm proper braking. Re-check reservoir level after a short ride and top if needed.
Tips for a clean, successful job
- Never let the reservoir run dry during bleeding – this introduces air and negates progress.
- Label the new brake fluid bottle after opening – use within the manufacturer's recommended time and keep it sealed to avoid moisture absorption.
- If you see a persistent air bubble at a particular caliper, inspect hoses and connections for cracks or leaks and replace soft rubber hoses if they swell or crack under pressure.
- Dispose of old brake fluid responsibly — it's hazardous waste.
- If the brake lever/pedal remains soft after multiple bleeds, consider a thorough inspection of the master cylinder, calipers, pistons, seals, and ABS components (if equipped). Replace worn seals or corroded parts as needed.
Model-specific notes for the 2017 Honda Rancher 420 4X4 ES (FE1)
- The FE1 Rancher 420 is a work-oriented ATV with a robust hydraulic brake system suited to utility use. Because this model sees heavy towing and load duty, owners should inspect brake pads, rotors, and fluid more frequently than leisure-only machines.
- Reservoir location and layout can vary by trim and optional equipment. Always confirm the reservoir(s) location and the bleed-point order against your owner's manual or your specific vehicle's service manual before starting. If your unit has multiple master cylinders or remote reservoirs, bleed each hydraulic circuit independently following the farthest-to-closest rule for that circuit.
- Use only DOT 3 brake fluid as specified by Honda for this model. Using higher-rated fluids like DOT 4 can be acceptable in many systems but check compatibility with seals and hoses — MotoSport recommends following Honda's factory spec unless performing an upgrade with compatible components.
- Because the Rancher 420 is often operated in wet & muddy environments, corrosion on bleeder nipples and caliper hardware is common. Lightly apply penetrating lubricant and carefully clean threads before opening; replace heavily corroded fittings to avoid failures or rounded fittings.
- If you frequently haul loads or tow, increase bleed intervals (annual or every 12 months) and inspect pads/rotors more often. Fresh fluid reduces fade and maintains brake responsiveness under load.
Signs you need a brake fluid service now
- Spongy brake lever or pedal, reduced braking power, or inconsistent feel.
- Dark, contaminated, or murky fluid in the reservoir (fluid should be clear to slightly amber).
- Visible leaks at calipers, hoses, or reservoir, or wetness around brake components after use.
If you run into stubborn air in the system, seized caliper pistons, or damaged hardware, MotoSport recommends servicing those components or consulting a qualified technician to avoid compromised braking performance. Keep your Rancher 420's brakes in top condition – it's one of the most important safety systems on your machine.
Related Shopping Categories
Shop Brake Fluid for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
Shop Brake Bleeders for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
Shop Brake Pads for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
Shop Brake Lines for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
Shop Brake Tools for a 2017 Honda Rancher 420 4X4 ES (FE1) ATV.
Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle'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.
