Why Is My Bike Not Changing Gears. Even if it doesnt change the gear completely the chain gets unseated from the teeth and can skip over them. The gear refusing to shift is the most common problem with a very simple solution indexing.
What is the cause of this. Learning how to effectively shift gears is a basic skill that continues to grow and improve even for veteran riders. For this answer Im going to assume you are talking about shifting a bike with derailleurs here.
Pull back on the top lever to shift the bicycle to a lower gear.
Noticeably absent is a skipping bike chain. When your bike chain starts to skip you could have problems switching gears and navigating your two-wheel chariot. Push the bottom lever to shift the bicycle up to a higher gear. Feather the throttle to accelerate the motorcycle.
