How to Bleed and Replace Brake Fluid on a 2008 Yamaha Grizzly 700 4X4

Shop parts for a 2008 Yamaha Grizzly 700 4X4 ATV.

This MotoSport-exclusive guide walks you through safely flushing old brake fluid and bleeding the hydraulic system on a 2008 Yamaha Grizzly 700 4X4. Follow these steps carefully to restore firm lever and pedal feel, prevent internal corrosion, and maintain braking performance.

What you need

  • DOT 4 brake fluid (Yamaha recommends DOT 4 in this model)
  • Clear plastic tubing that fits over bleed nipples
  • Clean catch bottle; fresh fluid for topping up
  • Wrench set (open-end or flare nut sizes typically 8mm or 10mm for bleed nipples)
  • Turkey baster or syringe (for reservoir fluid removal)
  • Shop rags, gloves, eye protection
  • Torque wrench (for caliper bolts if removed)
  • Jack or stands to lift wheels if needed

Safety and prep

  • Work on a level surface with the engine off and key removed. Avoid open flames or sparks near brake fluid.
  • Brake fluid eats paint & plastic — protect bodywork and clean spills immediately.
  • Use only fresh, unopened DOT 4 fluid. Do not mix DOT 3, DOT 5, or silicone fluids with DOT 4.
  • Label and keep old fluid for proper disposal according to local regulations.

Model notes for the 2008 Yamaha Grizzly 700

  • The Grizzly 700 uses conventional hydraulic disc brakes without ABS on the 2008 model year. That makes manual bleeding straightforward.
  • The front brake master cylinder is at the right handlebar; the rear brake master cylinder and reservoir are located near the rear brake pedal area/frame. Reservoir access is limited on the rear — have a small funnel or syringe handy.
  • Brake lines are routed and secured to the frame; inspect lines for cracks, chafing, or leaks while you work. Replace any damaged hose with OEM-spec or DOT 4 rated braided hose from MotoSport.
  • Caliper hardware can seize from road salt and mud. Apply penetrating lube if bolts are stubborn, and torque to factory specs when reassembling.

Overview of the procedure

Bleed and replace fluid system-by-system: front (right handlebar master cylinder) and rear (rear master). Always keep the reservoir topped up during the process to avoid sucking air into the system.

Step 1 – Prepare the bike

  • Raise and secure the ATV so wheels can rotate if needed. Clean around reservoirs and bleed nipples to keep contaminants out.
  • Remove reservoir caps and diaphragms; cover reservoirs with a clean rag to slow evaporation and contamination while working.

Step 2 – Remove old fluid from reservoirs

  • Use a turkey baster or syringe to remove most old fluid from the reservoir. Do not empty completely if the system cannot be bled immediately — plan to refill with fresh fluid right away.
  • Wipe inside the cap and around the filler area with a clean lint-free rag.

Step 3 – Flush and bleed the front brakes

  • Refill the front master reservoir with fresh DOT 4 fluid to the recommended level.
  • Locate the bleed nipples on the front calipers (both left and right). Follow the sequence: start with the caliper farthest from its master cylinder. For the handlebar master this is usually the caliper on the opposite side or the rear-most caliper if the routing is long — when in doubt, do both front calipers one at a time.
  • Fit clear tubing over a bleed nipple and submerge the other end in a small catch bottle partially filled with clean fluid to prevent air re-entry.
  • Have an assistant slowly squeeze the front brake lever while you open the bleed nipple about 1/4 turn. Fluid and air will flow into the bottle. Close the nipple before the lever returns to avoid sucking air back in. Repeat until you see clean, bubble-free fluid and the lever feel is firm.
  • Top up the reservoir frequently to prevent running dry.
  • Repeat for the other front caliper(s) until all front lines are clear of air.

Step 4 – Flush and bleed the rear brake

  • Locate the rear master cylinder reservoir near the rear brake pedal/frame area and refill with fresh DOT 4 fluid.
  • Find the rear caliper bleed nipple. Attach tubing and catch bottle as with the front system.
  • Have an assistant apply steady pressure to the rear brake pedal while you open the bleed nipple slightly. Close the nipple before the pedal is released. Repeat until fluid runs clear and bubbles stop.
  • If the rear pedal has a built-in proportioning or return, pump gently and use multiple cycles as needed while keeping the reservoir topped up.

Step 5 – Complete the job

  • Once bleeding is complete, tighten bleed nipples to manufacturer torque (snug; avoid over-torquing). Wipe away any spilled fluid and reinstall reservoir caps and diaphragms.
  • Pump the front lever and rear pedal several times to confirm firm pressure and no leaks. Verify travel and adjust free play if required.
  • Inspect brake lines, calipers, and connections for leaks while pressure is applied.

Post-service checks

  • Test ride at slow speed in a safe area to confirm braking response and pedal/lever firmness before normal use.
  • Re-inspect for leaks after the test ride and re-torque any fasteners if necessary.
  • Record the service date and mileage; brake fluid typically should be replaced every 1-2 years depending on riding conditions.

Troubleshooting

  • Soft lever or pedal after bleeding usually means air remains in the system — repeat bleeding and ensure the reservoir never runs dry.
  • If you continuously get air, inspect for leaking master cylinder seals or damaged lines and replace suspect components.
  • Contaminated or dark fluid that won't clear after flushing can indicate internal corrosion — consider caliper or master overhaul.

Parts and supplies

For OEM and high-quality replacement hoses, caliper hardware, reservoirs, and DOT 4 fluid suited to the 2008 Grizzly 700, MotoSport stocks parts and accessories specific to your model. Use parts that meet Yamaha specifications to maintain braking reliability.

Perform brake fluid replacement and bleeding carefully & methodically — brakes are a critical safety system. If you encounter seized components, persistent air, or uncertain symptoms, have a qualified mechanic inspect the system.

Related Shopping Categories

Shop Brake Fluid for a 2008 Yamaha Grizzly 700 4X4 ATV.

Shop Brake Bleeders for a 2008 Yamaha Grizzly 700 4X4 ATV.

Shop Brake Pads for a 2008 Yamaha Grizzly 700 4X4 ATV.

Shop Brake Lines for a 2008 Yamaha Grizzly 700 4X4 ATV.

Shop Brake Tools for a 2008 Yamaha Grizzly 700 4X4 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.