- Joined
- Nov 20, 2004
- Messages
- 20,405
I decided to fit the RGM extended (2.9" long) top fork bush kit (along with the 'Lansdowne' adjustable fork damper kit,-and more on that later) to replace the much maligned (by some!) Covenant conversion kit floating sleeves, just to see what the difference (if any) there actually was between them, as extended bushes (or extra sleeves fixed below the bushes) are supposed to act as a hydraulic buffer to prevent the forks topping out, and it has been assumed that Norton got it wrong, because the original bushes are not long enough to cover the stanchion restriction holes as the forks approach maximum extension, and there have been those who say that the floating Covenant sleeves just can't work.
So I will report that these RGM extended top bushes appear to do ABSOLUTELY NOTHING WHATSOEVER to control the action of the forks!
With SAE10 oil (as recommended by Lansdowne) and the Lansdowne rebound damper setting backed right off, so as not to mask any 'buffer' action the bushes may have, I can say that there is no apparent buffer action at all, and the forks can be made to top out quite hard at each rebound.
I may try some SAE20 oil later to see if that makes any difference, but I doubt it will?
So.....is this whole extended bush/fixed sleeve/floating sleeve buffer stop idea something of a Norton myth after all?
So I will report that these RGM extended top bushes appear to do ABSOLUTELY NOTHING WHATSOEVER to control the action of the forks!
With SAE10 oil (as recommended by Lansdowne) and the Lansdowne rebound damper setting backed right off, so as not to mask any 'buffer' action the bushes may have, I can say that there is no apparent buffer action at all, and the forks can be made to top out quite hard at each rebound.
I may try some SAE20 oil later to see if that makes any difference, but I doubt it will?
So.....is this whole extended bush/fixed sleeve/floating sleeve buffer stop idea something of a Norton myth after all?