Question for members - '69 Norton Mercury, swing arm with spacer and bushes, with single spindle bolt with two washers.
Manual does not mention Torque setting, they say 60Nm, seems a lot for swing arm.
What should it be, and how much up and down movement should it have?
I have tightened it down to 60Nm, result spindle bolt solid no movement, bushes pulled tight against frame plates, no movement, swing arm tight but movement up and down over bushes, seems as it should be, but not sure about torque setting.
Any info would be helpful.
Rgds - Denis
No. Bushes do not move. …
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As the inner assembly is…
As the inner assembly is solid accross the bike it just needs to be tight . Any spindle movement will wear the frame ,which should not happen.
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DSN Numbers
The Dominator Service Notes recommend a torquing of 50 lbs.ft across the SW Spindle. Do not overtighten this bolt or it will shear by the thread.
Some Owners chose to mount the SW wheel spindle mid-way between the suspension movement when they tighten the end nuts. This gives the Silent Blocs a slightly easier life.
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All the answers....
All the answers are in the Dominator Service Notes, PG 117 mentions the Torque, while Pg 67 details all the finer points about the bushes. But to emphasise yet again the hole in the frame gusset plate must be 'round'. It becomes oval with mileage, this can cause the spindle to move at speed and 'if you are lucky' it breaks the spindle. If this happens at speed you 'fall off' I know.
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No. Bushes do not move. Inner bush is clamped between the frame. Outer bush is tight within the swing arm cross tube. All the movement is within the rubber which should be unstressed when the nuts are tightened with a load on the seat.
If inner bushes move against the frame, you could fit washers outside them to take up any wear.
No oil or grease is used. Lots of discussions here about them. Don't change the rubbers unless you are very bored and enjoy pain.