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Old 01-28-2013, 05:43 PM   #5
bmwrench
Beastly Adventurer
 
Joined: Nov 2006
Oddometer: 1,915
The '81 on pushrod pilots into the "ring" at the rear of the crankshaft. If I was doing this conversion, I would add all the updates BMW made here: the clutch assembly, input shaft, gearbox cover, pushrod and thrust bearing. It's definitely worth doing; the '81 on clutch will handle far more power and is more user friendly.
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