To ensure your Shimano EF500 7-speed shifter stays reliable, regularly clean and lubricate the cable and mechanism.
Avoid using heavy greases; instead, opt for lighter lubricants like SIS SP41 grease for optimal performance.
If issues arise, a thorough cleaning with a product like WD40, followed by lubrication with a silicone-based lubricant or switch cleaner, can rejuvenate the shifter.
Always ensure the cable is free to move and not rusted, as this can significantly impact shifter functionality.