hey guys im new on here to three wheeler world seems like my knda world lol. anyways im trying to replace my old sprocket on my 250r i got the 4 bolts off that hold the sprocket in places and i got my wheel and hub off but how can i get that thing off that bolts to the sprocket i really dont wanna mess anything up cuz its too hard to find parts anymore and if i do its pricy any help would be greatly appreciated!!! thanks!