Just like changing the oil in your bikes transmission or your pick-up truck, your bikes suspension needs regular fresh oil and wear parts replaced
Did you know if you ride 2 hours a week, in 6 months you will have 50+ hours on your suspension!
If you ever wondered why you need to add more compression and rebound damping to your shock over time its because the piston band and o-rings wear. This allows oil to bypass the piston, that oil is no longer passing through the valving stack; the result: Damping control is lost.
Other items such as guide bushings, o-rings, dust and oil seals will also wear over time; these parts should be replaced to keep your suspension working in optimal condition.
As oil breaks down its lubrication properties begin to go away. With a lack of lubrication your suspension components are wearing out.
The oil in your suspension begins to break down, the performance you once had is beginning to go away;
There is a noticeable loss of damping control due to oil break down and parts wear.
Your oil has broken down, parts are wearing. The damping control is noticeable changed from fresh suspension.
Your oil has broken down, it is no longer providing the necessary lubrication to friction surfaces. Parts are worn; you are now at risk of causing damage to the inside of the shock body, fork cartridge rods etc.