This should be done annually in high mileage or extreme conditions or if you notice a loss of air or performance. Or if your friends give you a mountain bike themed nickname like crash, huckster or air-king!
$80
Inspect rear shock for damage & wear
Disassemble rear shock
Clean & lubricate inside
Install new air can service kit (if needed, parts are $15-$20.)
Change Canisters (additional charge for canister, applies only to DuAir shock)
Complete bleed of damper oil
Professional tuning recommendations for your riding style, bike, weight and terrain