I fear I am entering a minefield here.
I have stripped the forks on the 1961 ES2 I have recently bought, and found that some joker has welded the one damper tube together from two separate halves (why, I don't know).
So of course, the two halves are not perfectly in line resulting in a definite snagging as the plunger moves over the weld.
The length of the damper tubes is 9".
The tubes fitted to the bike have 4 equal size holes in the straight part below the taper.
I have sourced a pair locally (South Africa) also 9" long but the holes are in the taper itself and there are only two holes.
Which is the correct tube or can I use the two hole pair in the ES2?
Any advice please.
I assume they are short ro…
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That's an interesting art…
That's an interesting article.
A toolmaker friend of mine says that there are two major faults with the Roadholder fork. The slider is way too short, and there is too much stiction. He advises using a teflon upper bush to reduce the stiction.
There is little compression damping in the early short Roadholder. The plate at the bottom of the damper rod has deep cuts into it. The Commando fork got a compression damper plate with shallow flats at the edge, giving less by-pass when the shuttle valve is open during compression
I read somewhere that a company offers a modern damper insert for Roadholders, but have not found out who this is, and what the item is exactly. Anyone know?
Paul
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RGM offer the 'Covenant C…
RGM offer the 'Covenant Conversion'. It's less than £12. There is previous discussion on this site.
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I googled 'Covenant Conve…
I googled 'Covenant Conversion' and got this page on AccessNorton:
https://www.accessnorton.com/NortonCommando/covenant-conversion.1018/
If you scroll down to a post by Norbsa48503, he describes a further set of developments, but frustratingly, does not give a contact / business name etc, and not quite enough information on his version of the Covenant. Such as what the Ford valve spring is
Paul
Previously David Cooper wrote:
RGM offer the 'Covenant Conversion'. It's less than £12. There is previous discussion on this site.
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Thank you everybody. The v…
Thank you everybody.
The very comprehensive article by Peter Crespin makes it clear that the higher the hole is on the damper tube, the better. In the old design the hole was below the taper, in the first improvement it was in the taper and in the last design (Commando) in was above the taper.
The tubes I have sourced locally have the hole in the taper, so I will settle for that - I don't ride it hard anyway.
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I assume they are short roadholders with the damping tube and rods? I think my dampers had 2 holes above the taper, but canât be sure, you can buy new ones from AN and RGM, Iâm sure theyâd post them overseas. If I were you Iâd put them in and see how they work.
this prob explains it all! http://www.nocnsw.org.au/technical/norton-roadholders