Slimline frame differences by year? Ikon shocks

1down5up · Jul 29, 2015

Hi all.

Is there any difference between a slimline from say 1963 to 1968.

I'm looking to order a set of ikon shocks and the list them for an atlas 1966 onwards, however I didn't think there was any differences.

I have a 63 atlas. does anyone have any feed back on the ikons, from everything I have seen/heard/searched they seem quite good

Bernhard · Jul 29, 2015

1down5up said:
Hi all.

Is there any difference between a slimline from say 1963 to 1968.
I'm looking to order a set of ikon shocks and the list them for an atlas 1966 onwards, however I didn't think there was any differences.
I have a 63 atlas. does anyone have any feed back on the ikons, from everything I have seen/heard/searched they seem quite good[/quote

Atlas had 18 inch rear wheel as opposed to the 19 fitted on other models rear shocks on this model should be slightly longer.

lcrken · Jul 29, 2015

All 63 -68 650ss and Atlas used the same length rear shock, part number 24036, so I don't see any reason the Ikon for the '66 wouldn't fit the '63, unless there is some sort of interference to something on the earlier frame. And that seems pretty unlikely.

Ken

ashman · Jul 29, 2015

They should all be the same, I have a new set of Ikons on my 1960 Slimline I am building, they look the same as my old 37 year old Koni's but the Slimline shocks are shorter than the Commando Koni shocks, but have the same eyes top and bottom, I run 19" wheels on my Wideline and the Slimline has stock 18" wheels, Ikon shocks are the ducks nuts and once set up for your riding will make the Slimline even better to ride and the good thing is if they do wear out or blow a main seal they are rebuildable for about $50 for the rebuild kit and is not a hard job to do, I have had my old Konis now for 37 years and was just rebuilt last year for the first time, Ikon have all the kits to rebuild them.

Ashley

Rohan · Jul 29, 2015

ashman said:
if they do wear out or blow a main seal they are rebuildable for about $50 for the rebuild kit and is not a hard job to do,

Does the kit provide a new shaft, they are often very worn.
How do you gas them with nitrogen ?

The konis I had rebuilt recently had that old bogey of the internal bit going all gloopy and gumming up the works
and seizing up. Do these new ones and the kits use something different to prevent this ?

Bernhard · Jul 30, 2015

ashman said:
They should all be the same, I have a new set of Ikons on my 1960 Slimline I am building, they look the same as my old 37 year old Koni's but the Slimline shocks are shorter than the Commando Koni shocks, but have the same eyes top and bottom, I run 19" wheels on my Wideline and the Slimline has stock 18" wheels, Ikon shocks are the ducks nuts and once set up for your riding will make the Slimline even better to ride and the good thing is if they do wear out or blow a main seal they are rebuildable for about $50 for the rebuild kit and is not a hard job to do, I have had my old Konis now for 37 years and was just rebuilt last year for the first time, Ikon have all the kits to rebuild them. Ashley

Of course they are the same as they came out of the factory-they did not want some of those bike assembly idiots getting them mixed up :!:

There is someone on the wanted section who wants one for an Atlas with 12 inch distance between the centres ;

atlas-shocks-needed-t22792.html

Rohan · Jul 30, 2015

Waal y'all, the 1962 parts book shows different part numbers for the ES2, 88 and 99 rear shock to the 650 and 650 Deluxe version.
And the 650SS gets another part number.
And doesn't yet show the Atlas.
And, shows yet another version for sidecar use..

So there may be more to this than meets the eye ?

Bernhard · Jul 30, 2015

Rohan said:
Waal y'all, the 1962 parts book shows different part numbers for the ES2, 88 and 99 rear shock to the 650 and 650 Deluxe version.
And the 650SS gets another part number.
And doesn't yet show the Atlas.
And, shows yet another version for sidecar use..

So there may be more to this than meets the eye ?

The only person who can answer this correctly since he took over the old Girling shocks is Alf Hagon :?:

Nortoniggy · Jul 30, 2015

Rohan said:
Waal y'all, the 1962 parts book shows different part numbers for the ES2, 88 and 99 rear shock to the 650 and 650 Deluxe version.
And the 650SS gets another part number.
And doesn't yet show the Atlas.
And, shows yet another version for sidecar use..

So there may be more to this than meets the eye ?

They are probably the same shocks but with different rated springs, hence a different part number.

Ian

lcrken · Jul 30, 2015

Rohan said:
Waal y'all, the 1962 parts book shows different part numbers for the ES2, 88 and 99 rear shock to the 650 and 650 Deluxe version.
And the 650SS gets another part number.
And doesn't yet show the Atlas.
And, shows yet another version for sidecar use..

So there may be more to this than meets the eye ?

Could be, but the question Bernhard posted was whether there was any difference between shock length for slimline frames from 1963 to 1968, and I think we have answered that. There is no difference.

Ken

Beach · Jul 30, 2015

My 1966 and 1967 atlas use 12 inch eye to eye shock. .My 1974 Commando uses 13inch one....I would imagine lengths are same but my Atlas ones have a larger top bolt than the bottom..

Rohan · Jul 30, 2015

lcrken said:
Could be, but the question Bernhard posted was whether there was any difference between shock length for slimline frames from 1963 to 1968, and I think we have answered that. There is no difference.

With all those different part numbers, and the different rear wheel diameters, are we certain of that ?
And 1down5up posted the original question ?
Bernhard suggested there were different lengths...

lcrken · Jul 31, 2015

Quite right, it was 1up3down that started the thread. My mistake.

About the part numbers, the only part number in the factory parts lists for '63 - '68 Atlas, 650ss, 88ss, and 650/99 models is 20436, so I think it is reasonable to conclude that they all use the same shock. There are other part numbers for optional springs, but not for the shock itself.

Earlier model parts lists do show different parts numbers for shocks, and I don't have any info on their differences, but the question here was about the interchangeability of '63 - '68 Atlas shocks.

Ken

Rohan · Jul 31, 2015

Seems fair enough.

lcrken said:
Earlier model parts lists do show different parts numbers for shocks, and I don't have any info on their differences, but the question here was about the interchangeability of '63 - '68 Atlas shocks.

To be ultra precise, the question, and title, was about slimline shocks, and went on to mention later Atlas shocks.
Maybe Nortons and AMCs way of doing part numbers explains the early array of numbers pre 63... ?

Slimline frame differences by year? Ikon shocks

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