How to Bleed & Replace Brake Fluid on a 2008 Honda Rincon 680 4X4
Shop parts for a 2008 Honda Rincon 680 4X4 ATV.
This MotoSport-proprietary guide covers tools, supplies, and a step-by-step procedure to replace and bleed the hydraulic brake system on a 2008 Honda Rincon 680 4X4. Follow safety precautions, use the correct fluid, and work methodically to remove air and contaminants for a firm, reliable brake lever and pedal feel.
What you need
- Brake fluid that meets Honda specifications (use DOT fluid specified in your owner's manual; DOT 3 or DOT 4 are common).
- Clear hose that fits bleeder nipples, catch bottle, and fresh container for old fluid.
- Brake-bleeder wrench or appropriate open-end wrench for bleeder nipples.
- Rubber gloves, safety glasses, shop rags, and a clean funnel.
- Turkey baster or syringe for removing old fluid from reservoir.
- Jack or ramps and stands to safely lift the machine (if needed).
- Torque wrench for clamp/bolt reassembly (recommended).
- Optional: one-way bleed kit or vacuum pump to simplify bleeding.
Model-specific notes & tips for the 2008 Rincon 680
- The Rincon 680 uses a simple, accessible master cylinder reservoir located under the front hood area; keep the area clean to prevent contamination.
- Some 2008 Rincon models have a combined front/rear hydraulic system with separate calipers; identify each caliper and bleeder nipple before starting.
- The Rincon's calipers and lines are OEM-rated for ATV environments; replace any hoses that show cracking, swelling, or mildew rather than risking a simple flush.
- Brake fluid is hygroscopic & absorbs moisture over timechange intervals are important if you ride in wet or high-humidity conditions.
- If your unit has ABS components (some specialty trims), consult a qualified technician; ABS systems require special procedures and often computerized bleeding.
Preparation
- Park on level ground and secure the Rincon with the parking brake. Remove the key.
- Clean around the master cylinder reservoir cap to prevent dirt falling into the system when opened.
- Raise the machine only if needed to access bleeder screws. Support securely on stands or blocks.
- Wear gloves and eye protection. Old fluid damages paint & plasticsprotect surfaces with rags or tape.
Step-by-step fluid replacement & bleeding
- Open the reservoir and remove old fluid surface: use a turkey baster or syringe to remove as much contaminated fluid as possible without emptying the reservoir completely. Wipe residue clean.
- Top the reservoir with fresh specified brake fluid. Keep the cap loosely in place to minimize contamination while you work.
- Identify bleed sequence: always start with the wheel/caliper farthest from the master cylinder, then move progressively to the nearest. On most Rincon setups that means the rear caliper(s) first, then front caliper(s); if uncertain, locate master cylinder and choose the farthest caliper first.
- Attach clear hose to the bleeder nipple and place the other end submerged in a small catch bottle partially filled with fresh fluid to prevent air re-entry.
- Open the bleeder nipple one-quarter to one-half turn. Have a partner slowly pump the brake lever or pedal several times and hold it down; while held, open the bleeder briefly to allow fluid and air to exit, then close the nipple before the lever/pedal is released. Repeat until fluid runs clear and bubble-free. If using a vacuum or one-way kit, operate per tool instructions while monitoring reservoir level.
- Keep the reservoir level from dropping too low during bleeding to prevent drawing air back into the system. Refill periodically with fresh fluid.
- Work through each caliper in the correct order. After bleeding the final caliper, perform one final pass at each bleeder in reverse order to ensure no trapped air remains.
- When finished, tighten each bleeder nipple to proper snugness; wipe away any spilled fluid and reinstall the reservoir cap securely.
- Dispose of old brake fluid according to local hazardous-waste regulations.
Post-bleed checks
- With the engine off, verify lever and pedal feel is firm and consistent. If soft or spongy, repeat bleeding procedure.
- Start the engine and recheck for leaks around calipers, lines, and the master cylinder while applying the brake. Tighten fittings if necessary.
- Test ride at low speed in a safe area to confirm braking performance before returning to regular use.
Troubleshooting & common issues
- Persistent spongy brakes: re-bleed, paying attention to the farthest caliper first; consider replacing old hoses or the master cylinder if internal seals allow air entry.
- Brake fade or discoloration: contaminated or overheating fluid may require more frequent changes; upgrade to the correct higher-spec fluid only if the system calls for it.
- Leaking bleeder nipple or caliper: replace corroded nipples or rebuild/replace calipers to restore system integrity.
When to consult a pro
If you encounter ABS units, internal master-cylinder failure, persistent contamination that won't clear, or soft brakes after multiple bleed attempts, have a certified technician inspect the hydraulic system. Safety systems on ATVs should be returned to service only after verified repairs and tests.
Regular brake-fluid maintenance keeps stopping power predictable & reliable. MotoSport recommends inspecting brake lines and fluid level before long rides and after heavy-duty use.
Related Shopping Categories
Shop Brake Fluid for a 2008 Honda Rincon 680 4X4 ATV.
Shop Brake Bleeders for a 2008 Honda Rincon 680 4X4 ATV.
Shop Brake Pads for a 2008 Honda Rincon 680 4X4 ATV.
Shop Brake Lines for a 2008 Honda Rincon 680 4X4 ATV.
Shop Brake Tools for a 2008 Honda Rincon 680 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.