Siebenrock 1000cc Power Conversion Kit for R75, R90, R90S Models ('70-'75)
Up to 10 HP power increase for 1970-09/75 with 97mm block bore.
Just exchange Cylinders+pistons - nothing else has to be modified.
FITS: From 1970-75 up to 09/75 production date (97mm block bore)
Kit is complete except for top end gaskets.
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