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Dresda box section
Posted: Sun Mar 27, 2016 2:13 pm
Author: gray
As part of a recent rebuild , I replaced the bearings and the O rings that live outboard of the bearings in their own carrier.
1 O ring carrier is fat and 1 is thin but I can't remember which one goes on which side. Doh!!!
When I took it to bits I didn't realise initially that they were different.
Any suggestions lads?
Posted: Sun Mar 27, 2016 3:14 pm
Author: warren3200gt
How different are they? I'm just working on a 650 one which I'm pretty certain is the same as a 900 one. It fits a 650 frame and a 3 spoke CMA 900 wheel so guess they are? My carriers are both the same with a 10 thou shim between the roller face and the "o" ring carrier on the chain side but not on the other.
Posted: Sun Mar 27, 2016 4:24 pm
Author: gray
O ring carriers thicknesses 14.4mm and 7.5mm plus I find I need another couple to washers 1mm or so each side to take out the end float
Posted: Sun Mar 27, 2016 5:05 pm
Author: warren3200gt
Is the recess for one bearing deeper than the other? My carriers both stick out from the main tube by the same amount each side and the recess the roller bearing sits in is the same depth both sides. If your roller recss is shallower one side then I'say the thinner carrier fits that side to achieve the swing arm to sit central in the frame.
mine is a tight fit between the frame and doesn't need any extra spacers.
Posted: Sun Mar 27, 2016 5:36 pm
Author: gray
On the chain side of the swingarm the start of the outer bearing race is 6mm down , and on the other side it is 9mm down , so not enough of a discrepancy to match the O ring carrier's differences.
Can't remember ever getting instructions with the swingarm back in the 80s
Posted: Sun Mar 27, 2016 5:41 pm
Author: warren3200gt
It can only be to make the chain run in line. If the engines in you've got some fitting and measuring to do!
Posted: Sun Mar 27, 2016 5:57 pm
Author: gray
Ok. I've been fannying about with it while we've been online. The thin O ring carrier can go in either side , but the fat one only just gets its O ring into the swingarm recess if put on the non-chain side. So it probably isn't meant to be there.
I'll put the 2 additional spacer washers both on the non chain side cos then there's less fouling of swingarm on the exhaust hanger rubbers. But I'll check the chain run once the wheels on and the engine is back in the frame.
Unless there's a better solution...