WHY SUSPENSION ?
In order to keep your suspension working properly, it is important that it is serviced regularly. Just like an engine, suspension components have internal metal wear surfaces, so clean and fresh oil is important. Under normal conditions and an average amount of use (one ride a week for dirt; daily street use), fork and shock oil should be changed at least once a year. On dirt bikes , this general rule goes for other suspension related components such as swingarm and linkage bearings.
What are the advantages of having your suspension revalved and tuned versus just serviced ?
That is a very good question and one that invariably has different answers for different riders and every rider interprets and reacts differently to what his or her bike is doing Some riders may be more sensitive to bumps while others have trouble getting the bike to turn the way they want it, the examples are numerous and the degree to which each rider reacts to feedback from the bike is practically endless. In addition to individual rider needs, just about every bike that comes from the factory has some type of deficiency in the suspension categorey for any given rider. The factory can put one spring and valving setup in a bike for each year, make and model, and there is no way this solution can work for every rider. Even among different bikes of the same year, make and model there will be variances in how the suspension works based on tolerances, oil flow characteristics and other factors.
Revalving the suspension takes into account the bike and its characteristics in conjuntion with the rider and his or her personal needs and optimises the overall experience. Rider weight, skill level, riding style and bike use will all be taken into account when being revalved. Special rider concerns will also be considered, whether you're looking for a plusher ride or a setup that doesn't bottom. Revalving is essentially optimising the way that your suspension works for you, based on al the factors above.
If a bike has adequate springs for the rider's weight and proper sag numbers can be attained, some riders will find that the stock suspension can be "adjusted" to work adequately. For many riders revalving may not be the answer as some riders are not as sensitive to the suspension as others are - or you coud be one of the lucky few that stock setup works well for. However, if you have the feeling that your suspension has got to be able to work better than it currently does, then we can probably help you.
Don't ignore your suspension, a proper setup will make you a better and safer rider.