I put it on a Crypton X that replaced the crappy one that died. The bike seemed to come to life in terms of performance and speed. Honestly, if I knew it would revive so much, I would have changed it years ago. Of course, I took it to a workshop and they charged me 45 euros, and with the labor costs, I paid around 70 euros. So, buy it from the internet where you can find it for 30 euros and if you can, it's not difficult, replace it yourself.