The 89 and 90 RMX was very close to the 89 RM250 and the 91 to 96 shared a lot of parts as well. The 89 RMX main differences to the 89 RM were bigger tank, big boat anchor silencer, lighting coil/ flywheel, longer swing arm, rear guard, side stand, head light and wr gearbox. Parts are easy to find as the US RMX never really got updated unlike our model after 96.