How to Bleed & Replace Brake Fluid on a 2012 Yamaha Grizzly 700 4X4 EPS

Shop parts for a 2012 YAMAHA GRIZZLY7E ATV.

This guide is MotoSport's proprietary, step-by-step procedure for flushing and bleeding the hydraulic brakes on a 2012 Yamaha Grizzly 700 4X4 EPS (MMY: YAMAHA;GRIZZLY7E;2012). It covers required tools, safety, the correct fluid type, and specific considerations for the Grizzly's EPS-equipped platform.

What you need

  • DOT 4 brake fluid (fresh, unopened)
  • Clear hose that fits the bleed nipples snugly
  • Catch bottle for old fluid
  • Brake-bleeding vacuum pump or a helper for manual bleeding
  • Wrenches for bleed nipples (metric) and reservoir cap
  • Clean rags, isopropyl alcohol, and nitrile gloves
  • Jack/stands or stable ramps to access wheels
  • Small container to keep reservoir topped during the procedure

Model-specific notes for the 2012 Grizzly 700 4X4 EPS

  • The Grizzly 700 uses DOT 4 fluid from the factory. Do not mix DOT 4 with DOT 5 (silicone) fluids.
  • There are separate master circuits for front and rear brakes; treat each circuit independently. Always identify which master reservoir feeds which caliper before you begin.
  • EPS components are sensitive to contamination. Keep electrical connectors and the EPS area dry and free of spilled brake fluid; brake fluid will damage paint and many plastics.
  • Bleed the circuit farthest from its respective master cylinder first. If you are unsure which is farthest, sit on the ATV and visually trace the hoses from reservoir to calipers.
  • Bleed nipple hardware on Yamaha calipers can be cleaned and lightly protected with anti-seize after the job, but never allow anti-seize into the hydraulic path.

Safety & preparation

  • Work on a level surface and secure the ATV to prevent movement.
  • Wear safety glasses & gloves. Brake fluid is corrosive to paint and plastics.
  • Have a clean, sealed container ready for used fluid; dispose of fluid per local regulations.
  • Keep the reservoir cap loosely in place until ready, then remove it only when topping up to avoid contamination.

Step-by-step procedure

1. Inspect & identify

  • Locate front and rear brake fluid reservoirs. Note which reservoir feeds which calipers. On the Grizzly, the front lever reservoir feeds the front calipers; the rear pedal reservoir feeds the rear caliper(s).
  • Check hose condition for cracks, swelling or leaks. Replace any suspect hose before bleeding.

2. Prepare the system

  • Clean the reservoir cap area thoroughly with a lint-free cloth and isopropyl alcohol to prevent contamination.
  • Remove the reservoir cap and diaphragm; keep dirt out. Top the reservoir with fresh DOT 4 fluid so it is above the minimum mark.
  • Mount the clear bleed hose onto the caliper bleed nipple and place the other end into the catch bottle partially filled with clean fluid to avoid drawing air back in.

3. Bleeding method A Vacuum pump (preferred for one-person work)

  • Attach vacuum pump hose to the bleed nipple. Crack the nipple open about a quarter turn.
  • Apply vacuum, then open the pump to draw fluid until you see clear, bubble-free fluid from the caliper into the bottle.
  • Keep the reservoir topped with fresh fluid throughout to prevent air entry.
  • Close the bleed nipple while under vacuum, then release pump. Tighten the nipple securely. Wipe clean.
  • Repeat until fluid from the caliper runs clear and free of air for each caliper on that circuit.

4. Bleeding method B Two-person (manual pedal/lever pump)

  • Person A (at the lever/pedal) slowly applies steady pressure to the brake lever or pedal and holds it.
  • Person B opens the bleed nipple just enough to let fluid flow into the tube; close the nipple before Person A releases pressure.
  • Repeat the pump-and-hold sequence, topping up the reservoir often, until clear, bubble-free fluid appears.
  • Always close the bleed screw before the lever/pedal is released to avoid drawing air back in.

5. Sequence & tips

  • Bleed the circuit farthest from its master cylinder first and work toward the master. For example, if the front circuit has two calipers, bleed the right front then left front (or vice versa depending on hose routing), then the master.
  • For the rear circuit bleed the rear caliper(s) following the same farthest-first logic.
  • Keep the reservoir full during the entire process. Never run the reservoir dry.
  • Inspect the fluid color: old fluid darkens and may contain moisture. Continue bleeding until new clear DOT 4 fluid appears.

6. Final checks & reassembly

  • Tighten all bleed nipples securely and wipe any spilled fluid immediately.
  • Replace reservoir diaphragm & cap. Ensure a proper seal.
  • Check lever and pedal feel — they should be firm with no sponginess. If spongy, re-bleed the affected circuit.
  • Lower the ATV, torque any removed wheels or caliper mounting bolts to factory specs if you removed hardware for access.
  • Dispose of used brake fluid responsibly.

System test

  • With the ATV on its wheels, start it and carefully test brakes at walking speed in a safe area. Confirm solid feel and no leaks.
  • Perform a few low-speed stops to bed the system before normal riding.

Maintenance interval & recommendations

  • MotoSport recommends flushing and replacing brake fluid every 1-2 years or sooner if exposed to heavy water, heat, or contamination.
  • Always use DOT 4 fluid and keep spare fluid sealed and stored in a cool, dry place.

Troubleshooting

  • Persistent spongy pedal after multiple bleeds could indicate air trapped in a caliper, a leaking hose, or a faulty master cylinder. Inspect lines and seals and replace components as needed.
  • If a caliper will not purge air, remove it from the mount and bleed with the piston pushed in slightly to force trapped air out, then reinstall.

Following this MotoSport procedure will restore proper brake performance on your 2012 Yamaha Grizzly 700 4X4 EPS while protecting EPS components and the vehicle finish. If in doubt, consult a professional mechanic familiar with Yamaha ATVs.

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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.