Cam gear noise

While some positive backlash is necessary to prevent gear tooth overloads, excess backlash (“clicking“) may sound annoying but won´t hurt anything. To correct noisy gears use either a larger cam gear or pinion gear. Tight fitting pinion and cam gears will cause very noticeable whining as a result of running with zero backlash which is a serious problem. In this case a smaller cam gear or pinion gear is required.