Originally Posted by Plaka
And the big cc cranks and cams fit? Gee, I may rework my /5 block...
Never touched the bottom end. Bolted the 1000cc pieces directly onto the /5 block. It was never an issue.
Years before when modding a '76 R60/6 to become an R100/6 I tried to learn about any difference between the cranks (a local "expert" had told me the counterweights had different inserts) and never did get any definitive information. I swapped the cam to use a /7 308 and ran the /6 crank without issue. It was the smoothest 1000cc boxer I've ridden to date.
I still don't know if there's any difference in any of the post '74 cranks. Think I checked once and they all had the same part number.