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The /2 crank has no centre bearing – it’s like a wet noodle.
The R69 can go more than 1000 rpm faster than a /2 and has the damper in front and a special bearing in the rear to help save the crank.
The vibration damper on the front of the generator, which is the front of the crankshaft, is to counteract the flex of the crank at high rpm.
Whatever flexing the damper does not cancel out, the special rear bearing then absorbs.
(Part# 99113065R).
This rear main bearing on the R69 is a special spherical bearing to allow the crank to flex at high rpm without damage. Imagine a bearing that allows you to move the shaft up and down as you turn it.
Really appreciate the fast service. I ordered my K100RT clutch cable Monday and received it Tuesday and considering it was from WA to Tas and you also reduced the freight to reflect the actual cost. How good is that !! 🙂 Many thanks.
Thanks so much for the prompt service. Received everything I ordered in rapid time.