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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.
You blokes are amazing… there is never a let down with your company… Cheers and thanks again…and a good year to you too mate..
Hi there I just want to say thank you. I ordered most recently this: BMW R65 1984 – worn out throttle cam and twist grip splines Came in record time and now fitted has made me realise that the bike has been down on power due to a sticking and slipping throttle mechanism ever since I have owned it. I love your site, great reliable service. Whilst you guys are around I’ll never go anywhere else. Thanks heaps