When Speed Gear is used time will slow down for Mega Man allowing him to avoid spikes and other hazards. Speed Gear will also allow Mega Man to fire his weapons rapidly while enemies move in slow motion. Power Gear increases the power of Mega Man's weapons and Double Gear gives you both perks at once. When a gear is being used Mega Man starts to overheat as indicated by a gauge above him, which slowly builds up the longer he uses a gear. The gauge can be cooled down by deactivating these gears and if it overheats all Gear Systems will be lost temporarily.