I installed it at CELLO 250 with its company PCY (adapter). Because it is used on a motorcycle flight, expendable parts are choosing things that last as long as possible. There are several types of sprockets for the CELLO 250, but there are several kinds of sprockets made of aluminum, but if you made a steel with a long life, you were giving up if there was only one genuine Yamaha item, I knew that XAM was making steel besides aluminum. However, for some reason I did not deal with general motorcycle shop, but I reached Monotarou while I was looking for it. The price is also cheap PCY is made of aluminum so it is slightly lighter than genuine. I will continue to use this product in the future.