I am wondering if someone knows what the bolt spacing is for a rear sprocket on an Ssr 125. I would like to upgrade this part but don't want to order one until I know for sure. Any help would be appreciated. This is my first time posting so I hope this is the right place for this question. Also I already searched the forums to see if this question has already come up and I didn't find anything. I currently have a 420 chain and was thinking about going to a 428. Any thought on this would be helpful