Quick Answer: It is recommended that only a qualified mechanic assembles cockpit components such as handlebars and controls. Always refer to the maximum suggested torque provided by the manufacturer of your handlebar controls (brake levers, shifters, remotes), and grips. Do not exceed this maximum torque, and always use a calibrated torque wrench when assembling or maintaining your cockpit components. Over tightening cockpit bolts can lead to stress risers in your handlebar, and premature failure and/or injury. Controls should be tightened onto handlebars, only until slippage during use has been eliminated, but the control component can still move in the event of a crash or accident. This will help to prevent unnecessary damage to your handlebar, which is not covered by warranty. Always refer to the maximum suggested torque provided by the control manufacturer. Note: Maximum suggested torque on controls from several major manufacturers can be exceptionally low, sometimes as low as 2Nm.