Siebenrock 1000cc Replacement Piston/Cylinder Kit for '77-'80 R100 Models
This kit is for bikes that are already 1000cc 1977-1980, to be used with 1000cc cylinders heads.
Dual plug ignition is recommended due to high compression pistons. You can install low compression base gaskets (part number 1111650) to reduce compression to 8.8:1 to eliminate the possiblity of damaging pre-ignition, otherwise known as pinging.
Kit is complete except for top end gaskets which you can purchase below.
You would use this kit to replace the old steel liner cylinders used from 1977-1980 that were prone to wear prematurely and were not very stable when bored first oversize. We do not recommend boring R100 cylinders.