I am not all that acquainted with the mechanics in the DJ type drives but have been racking my mind. The 83 and 90 pumpkins are the substitute for the 50. with the machining that has to happen couldn't someone just replace the 5th gear from a bigger bike and trade it for the one in a 50. Like I said I haven't looked inside either but it seems to me that it would just be a change like changing the gear on a dirt bike. Or has anyone with some of the Suzuki home links suggested it. They have to know it is a constant complaint. Just curious!