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Message: [QUOTE="willomega, post: 1405624, member: 121112"] Have an '89 (?) KX 125 (last year before the perimeter frame) that I would like to bring back to life for my adult daughter to use as a trailbike (she has riding experience). The 125 motor is just not suitable for the tight, technical trails we ride. The obvious answer is to put a KDX motor into the KX chassis. Does anyone know if the '89 KDX motor is a direct bolt-in to the KX frame? Looked up the parts lists online and my results were inconclusive: both engines share some, but not all, lower end bearings and seals. Both the KX and KDX lower ends appear identical in the parts fiches, but obviously, can't go by that. Does anyone have personal experience doing a project on the '89's? Does anyone have an '89 KDX motor either for sale or that you would be willing to help me get dimensions and measurements for comparison? Any and all comments welcome. [/QUOTE]