Looking for an early 125cc rotary valve engine from an S10 made about 1967 (4 speed) or a later model K125 rotary valve engine (5 or 6 speed) made up to about 1974. Neither were imported in any great numbers if at all but it's only the engine or even just the complete bottom end I'm needing. Eng numbers will start with the model prefix K125 - ***** or S10 - *****. A GP125 engine may also be of interest. thanks