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Old 08-30-2013, 07:56 PM   #52
Lost In Place
Lornce's Avatar
Joined: Aug 2003
Location: Way Out There.
Oddometer: 18,249
Originally Posted by Plaka View Post
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.

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