Previously, I removed the heads, cylinders, pistons, rings and connecting rods. I installed new rocker arm needle bearings to replace the broken bearing cages. I disassembled the heads and inspected the valves and seats. You can read how I did that work here.
- 11 BMW 1977 R100RS Remove Pistons, Connecting Rods & Inspect
- 11 BMW 1977 R100RS Replace Rocker Needle Bearings, Remove Valves & Inspect
You can read about how I did this work here:
Top End Rebuild Work
I had the Nikasil cylinders replated and honed to match the new high compression (9.5:1) pistons. I had the connecting rods refurbished and I had the heads rebuilt. So now it’s time to put it all back together again.
The cylinders had the push rod tubes and the two short studs at the 12:00 and 6:00 position of the heads removed, so I also have to install them.
I started from this:
And finished with this: