You are welcome, BTW, it is the 850 only that has the engine spinning "opposite", the previous 600 and 750 were "right" (like the 127), so - in theory - you can

You are welcome, BTW, it is the 850 only that has the engine spinning "opposite", the previous 600 and 750 were "right" (like the 127), so - in theory - you can mount a 903 cc from a 127 on a 600 but not on a 850 (unless you change the camshaft and don't know what other parts, probably the water pump ).