Dominator 99 swing arm identity?

Hi Chris,

looks like a Norton Nomad swing arm to me. The bike wasbasicallya '57 model 77 for off road use. One of the differences to the standard model 77 was the swing arm which was widened to accept a wider rear tire. The ends were flat & the tube part would have been oval. I have enclosed a link to Big D Cycle's blog that shows pics of a Norton Nomad they are restoring & it shows the wheel adjusters. They are big washers with a threaded rod welded on the rearward side & a nut, washer, and rectangular plate at the end of the swing arm to pull the wheeltowardthe rear.

Link:

http://bigdcycle.com/blog/?p=287

Hope this helps,

Skip Brolund

Chris, your swingaram is almost certainly one from a Model 7...identical to my '53 one and all made of round tubing.

Deffinitely not a Featherbed item.... it's amazing it fits, butI guess the wheel and brake is also from a Model7.

Les

Chris,

I'll measure my 77 swing arm & let you know, but my swing arm is probably the swing arm you want. The Nomad is not only a wider width (how much I dont know) but it is unique in that the the cross section of each leg is oval, where I think the model 7 swing arm cross section is round. That may help narrow it down.

Skip

hello this swinging arm it of a 1954 dominator 88 and so is the back plate . I have a 1954 Dominator 88

Hi Chris. I'm very sorry for leading you up the wrong path. I have a good NOC friend who advise me that the swing arm is very likely to be CORRECT for an early featherbed frameso I was WRONG to say it was likely to be a Model7 swing arm.

HOWEVER My NOC pal Paul W. says it was around 1956 that the cast lug swing arm was introduced and you say your bike is a 1960 model, so it does seem something is wrong and Anna says it looks the same as her 1954 one.

regards

Les

See the exploded diagram from the 55 model 7 and 88 swingarm.

Previously wrote:

Well judging by everyones responses its definitely something other than the slimline swing arm, I'll see if I can track down a usable slimline one(might have just the thing on the trusty old internet) for a sensible price.

Les - Interesting idea about it being from a Model 7, more interesting was the suggestion that wheel and brake might also be the same, is there any way to tell if thats also the case?

Skip - When you mentioned that it might be a Nomad swing arm you said that they were the same as the Model 77, but widened to take a wider rear tyre. Would you happen to know how far apart the swing arm forks are meant to be on either the 77 or the Nomad?my swing arm is approx. 8 inches inbetween the forks.

Cheers

Chris

Hello Chris,

I've just come across your post about Dommie s/arms. the one in your illustration is the same as that fitted to my 1951 "88" and the distance across the fork end is 7.875". I have measured the distance across a 1962650 SS fork end and it is the same 7.875". Regarding back brake plates, I have not found any difference between that of my early "88" and those from my later 58 w/line or 60 s/line. Iremember that my 195619S, which was the same as themodel 77 but a 600 singlehad a round section arm with the later form of adjustment, and on the basis that my Dommie back wheel would fit the 19S s/armwithout any adjustment they must both have been the same width. I hope this might be of some help.

All the best Ian. Thames Valley NOC.

Previously wrote:

Previously wrote:

Well judging by everyones responses its definitely something other than the slimline swing arm, I'll see if I can track down a usable slimline one(might have just the thing on the trusty old internet) for a sensible price.

Les - Interesting idea about it being from a Model 7, more interesting was the suggestion that wheel and brake might also be the same, is there any way to tell if thats also the case?

Skip - When you mentioned that it might be a Nomad swing arm you said that they were the same as the Model 77, but widened to take a wider rear tyre. Would you happen to know how far apart the swing arm forks are meant to be on either the 77 or the Nomad?my swing arm is approx. 8 inches inbetween the forks.

Cheers

Chris

Hello Chris,

I've just come across your post about Dommie s/arms. the one in your illustration is the same as that fitted to my 1951 "88" and the distance across the fork end is 7.875". I have measured the distance across a 1962650 SS fork end and it is the same 7.875". Regarding back brake plates, I have not found any difference between that of my early "88" and those from my later 58 w/line or 60 s/line. Iremember that my 195619S, which was the same as themodel 77 but a 600 singlehad a round section arm with the later form of adjustment, and on the basis that my Dommie back wheel would fit the 19S s/armwithout any adjustment they must both have been the same width. I hope this might be of some help.

All the best Ian. Thames Valley NOC.

Hello Chris, Since submitting the post above ( and before anyone else points out my mistake) I have checked my long dismantled S/line 99 and of course realised that the brake plate is different and islocatedin a slot in the rear forging of the s/arm unlike the earlier torque arm method.

Ian. TV NOC.

Previously wrote:

Hello Chris, Since submitting the post above ( and before anyone else points out my mistake) I have checked my long dismantled S/line 99 and of course realised that the brake plate is different and islocatedin a slot in the rear forging of the s/arm unlike the earlier torque arm method.

Ian. TV NOC.

Hi Ian,

Thanks to you and the rest of the members that have been very helpful in providing so much info on my swing arm.

As it looks like changing the arm to the later slimline type will have a knock on effect for the brakes etc,so for now I'm going to make do and get the older pull back adjusters. At some point I'll change it over to the correct one, I'vejust had some good news from our local vehicle inspectors. It turns out there's no time limit between bringing a bike over from the UK to Jersey and registering it locally if its off the road as a restoration project. So now I can take things a bit slower. Which is good news for my wallet! )

Thanks again everyone, I'm sure there's going to be lots of other interesting questions I might ask you all as time goes on.

Cheers

Chris