Honda Rincon 680 Rear Suspension Parts Diagram Explained

The Honda Rincon 680 is a popular utility ATV known for its independent rear suspension (IRS) system. Understanding the rear suspension parts diagram is essential for maintenance, repair, or upgrading. This guide breaks down each component, explains their function, and helps you identify parts for replacement or troubleshooting.

Rear Suspension Overview

The Honda Rincon 680 uses a fully independent rear suspension with a dual-arm design. This setup provides a smooth ride over rough terrain and maintains tire contact for better traction. The system consists of control arms, springs, shock absorbers, stabilizer bar, and various bushings and fasteners. The diagram typically shows the rear axle assembly, swingarm (though Rincon uses A-arms), knuckles, and linkage.

Diagram Breakdown

Key Components in the Honda Rincon 680 Rear Suspension

• Rear Upper Control Arms: Two arms that connect the top of the knuckle to the frame. They control camber during suspension travel.
• Rear Lower Control Arms: Larger arms that bear most of the load. They connect the bottom of the knuckle to the frame.
• Rear Knuckle (Spindle): The hub that holds the wheel bearing and brake assembly. The knuckle pivots on ball joints from the control arms.
• Rear Shock Absorbers: Gas or oil-filled dampers that control spring oscillation. Each shock attaches between the lower control arm and the frame.
• Rear Coil Springs: Wound springs that support the vehicle's weight and absorb bumps. They sit over the shocks or separately in some models.
• Stabilizer Bar (Sway Bar): A torsion spring that connects both sides of the suspension to reduce body roll.
• Bushings and Ball Joints: Rubber or polyurethane components that allow pivoting and absorb vibration. Common wear items.
• Rear Driveshafts (Axles): Transmit power from the rear differential to the wheels while allowing suspension movement.
• Rear Differential Mounts: Brackets and bushings that secure the differential housing to the frame.

How to Read the Parts Diagram

OEM diagrams are organized by component groups. The rear suspension section typically includes sub-sections for the left and right sides. Each part is numbered and corresponds to a list with descriptions and part numbers. For the Rincon 680, diagrams often show the shock/spring assembly, upper and lower arms, knuckle, and related hardware. Pay attention to the orientation and the number of bushings—some diagrams include separate washers and spacers.

Common Components and Their Part Numbers

While we cannot provide direct links, common part numbers for the Honda Rincon 680 rear suspension include:

• Rear shock absorber assembly: 52400-HM5-A00 (Note: verify with your year/model)
• Rear coil spring: 52401-HM5-A00
• Rear upper control arm: 52300-HM5-A00 (left), 52310-HM5-A00 (right)
• Rear lower control arm: 52320-HM5-A00 (left), 52330-HM5-A00 (right)
• Rear knuckle: 52350-HM5-A00
• Stabilizer bar: 52360-HM5-A00
• Ball joint kit: 52370-HM5-A00

Always confirm with your vehicle's VIN or model year (2001-2005 for Rincon 680). The 680 was produced from 2001 to 2005, but mid-year updates may affect part numbers.

Common Issues with the Rincon 680 Rear Suspension

Worn Bushings and Ball Joints

Over time, rubber bushings crack and ball joints develop play. Symptoms: clunking noise, loose handling, uneven tire wear. Replacement involves pressing out old bushings and installing new ones. Polyurethane bushings are a durable aftermarket upgrade.

Leaking Shock Absorbers

Shocks can leak oil, leading to reduced damping and a bouncy ride. Replace in pairs for consistent performance. Aftermarket options include heavy-duty or adjustable shocks.

Corroded Hardware

Especially in salt-spray environments, bolts and nuts seize. Use anti-seize on reassembly.

Stabilizer Bar Link Wear

The links that connect the sway bar to the control arms have bushings that wear out, causing rattling. Replacement links are inexpensive.

Identifying Parts for Replacement

When you need to replace a part, use the diagram to locate the exact item. Note that the diagram shows exploded views—each component is separated. For example, the shock assembly might include the spring, shock absorber, and upper/lower mounting bolts. If you order just the shock, you might need to reuse the spring. OEM diagrams also include snap rings, washers, and rubber boots.

Tips for Ordering Correct Parts

• Write down the part number from the diagram and cross-reference with your year/model.
• Inspect the actual part—sometimes design changes happen mid-year. Compare bolt hole patterns.
• If the diagram shows "RIGHT" and "LEFT", make sure you order the correct side. Right is passenger side in the US.
• For suspension components, it's wise to replace related hardware (bolts and nuts) as they may be torque-to-yield.

Maintenance and Service Recommendations

• Inspect rear suspension bushings every 50 hours or annually. Look for cracking or play.
• Grease ball joints and tie rod ends (if equipped) at factory intervals.
• Check shock absorber for leaks after every ride.
• Torque all suspension bolts to spec (typically 40-60 ft-lbs for control arm bolts, 80-100 ft-lbs for shock mounts). Use a service manual.
• If replacing shock absorbers, consider upgrading to a high-quality aftermarket brand like Progressive or Elka for improved ride.

Final Recommendation

For any repair or part replacement on your Honda Rincon 680's rear suspension, start with an accurate parts diagram. Either obtain a physical service manual (Honda part number 61HM5A00) or find a reliable online source. Compare your existing part to the diagram to ensure correct ordering. Common wear items like bushings, ball joints, and shocks are straightforward to replace with basic mechanic skills. When in doubt, consult a professional ATV technician. A well-maintained rear suspension keeps your Rincon 680 stable, comfortable, and safe for years of off-road fun.