I think so (don't take that to the bank tho) at thexscafedotcom.wordpress.com I found a manual for the xs1,xs2, tx650 that shows the cutters for the valves. There is a 45' 40mm cutter for intake,45' 34mm cutter for exhaust,65' 42mm cutter for intake and exhaust plus a seperate cutter for radius for intake and exhaust. There was not a part number for the cutter set but I would think they used them on a load of models back then.