To determine if your motorcycle suspension needs servicing, pay close attention to the bike’s handling, the condition of the suspension components, and any visible signs of wear or damage. Here are key indicators that can help you recognise when servicing may be needed:
1. Changes in Handling and Feel
• Soft or Spongy Feel: If the front forks or rear shock feel excessively soft or spongy, it could be a sign that the suspension fluid needs replacement. Worn or degraded oil results in less damping, causing the bike to feel less stable, especially when cornering or braking.
• Harshness Over Bumps: If you notice that every bump on the road feels much harsher than usual, the suspension could be bottoming out, or the damping might not be working effectively due to old or insufficient fluid. Suspension that’s too stiff or bottoms out easily can compromise both comfort and control.
• Unstable or Bouncy Ride: If the bike feels like it’s “bouncing” or oscillating after hitting bumps, it indicates worn shocks or springs that can’t properly absorb impacts. This “pogo stick” effect is often due to inadequate damping from low or contaminated suspension oil.
2. Leaking Seals
• Visible Oil Leaks: Check the forks and rear shock for any signs of oil around the seals. Seals should keep suspension oil contained; if oil is seeping out, it can mean the seals are worn, cracked, or damaged. Leaking oil also reduces the amount of suspension fluid, which lowers damping effectiveness and can lead to suspension failure.
• Residue on Fork Tubes: Run your finger along the fork stanchions (the smooth tubes that slide in and out of the outer tubes). If there’s a greasy residue or visible oil streaks, this indicates seal leakage. In extreme cases, this oil can even end up on your brakes or tires, which poses a significant safety risk.
3. Unusual Noises
• Clunking or Knocking Sounds: If you hear clunking, knocking, or other unusual sounds when riding over bumps or while braking, it may mean that internal suspension components, like bushings, springs, or valves, are worn or loose. Such noises are often a sign of a suspension system that needs attention.
4. Increased Sag or Dive
• Excessive Front End Dive: When braking, if the front end dives more than usual or bottoms out, it’s likely that the front suspension needs servicing. Worn springs, low oil levels, or degraded oil can make the suspension too soft.
• Rear Squat or Reduced Ride Height: If the rear of the bike sits lower than usual or “squats” under acceleration, the rear shock may be worn out or leaking, requiring repair or replacement.
5. Service Interval and Visual Inspection
• Manufacturer’s Recommended Interval: Suspension fluid and seals degrade over time. It’s a good practice to service your suspension at regular intervals based on the manufacturer’s recommendations—typically every 10,000–20,000 miles, though this varies by bike and riding conditions.
• Visual Inspection: Regularly inspect your suspension components for any visible damage, rust, or wear. Pitted fork tubes, for instance, can lead to premature seal wear and leakage.
Why Servicing Suspension is Important
Suspension maintenance is essential not only for comfort but also for safety and performance. Fresh oil and properly maintained seals ensure that the bike handles well, absorbs impacts, and maintains traction, all of which are crucial for a safe, responsive ride. Properly serviced suspension components will also last longer, helping you avoid costly repairs in the long run.
If you’re noticing any of these symptoms, it’s likely time to have your suspension checked by a qualified technician.
