can you rebuild them? also can they be uprated with heavier oil to stiffen the action?
Hi Ian yes they can be rebuilt seals etc are obtainable and quite a few parts are interchangable/ universal some mg,s use them so I would try mg restoration/ spares suppliers (moss, rimmer brothers etc) first. Not sure about uprating them just by using heavier oil I think to uprate them you have to alter the valving but its been years since I,ve messed about with them so I may be wrong hope that helps a bit
The world expert is in the USA. You can modify the valves and use a slightly thicker oil. However, if the unit is worn you will be wasting your time, also it can be very difficult to bleed the air out of the unit. In the UK, a re-con Armstrong often means it's been very nicely painted.
I've used thicker oil to uprate laver arm dampers in the past. The stuff I used was 30 weight motorcycle fork oil, on the basis that it is a hydraulic oil, so should be OK with the seals etc in the dampers, made a big difference to their resistance; but lever arms are still a very poor second to tele dampers IMO though even when they're uprated.
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