Hoping someone can help me. I am restoring a 1952 ES2 I have had both front and rear wheels rebuilt, new rims and spokes. The front is fine but I think the rearis not. It has been laced up central to the hub consequently when fitted into the swinging arm it is offset to the right, the brake drum being on the left means the hub is biased to the right. Am I correct in assuming when lacing up the rim it should be offset to allow for this? if so what is the correct offset.
Hello Brian. As far as I k…
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Previously wrote: Hello Br…
Previously wrote:
Hello Brian. As far as I know the rims on Norton modelsshould be central to the hub, that is central to the hub spoke flanges. Only the Commando is off-set. I have an original model7 wheel, which is similar I think. The offset relative to the nearside/brake flange face is about 8mm and it certainly looks central. Check yours.
If your one has been built centrally,but it is obvious to the eye that it looks well over to the right something is very wrong. possible swingarm distortion or incorrect spacers?
Wheel builders say when a wheel is rebuilt one should always take a measurement of the old rimand note it, however I've always argued that the wheels were never built to match the bike but they were built independantly witheitherno offset or to a specified offset.
So if the wheel should have a centralised rim, Iwould prefer them to be built centrally and with no offset. If it does not line up, I will correct the problem with the bike (adjusting spacers or finding the source of the frame problem)which is surely the CORRECT way to do things?
I suppose if you cannotfind out what is wrong you will have to get them built with an offest, but I would not be happy with the entire bike if I had to resort to this method.
Les
Thanks for the information Les, this machine was abox of bitswhen I started restoring it, I felt as the engine and frame numbers were the same it was a good starting point. I am not sure what is and is'nt correct on it. The swinging arm was new and looks correct, I have tried spacing the wheel over but the brake backing plated touches the swinging arm before the wheel is central. I am at a loss as to where else to go, there are not too many ES2s here in Australia that I can have a look at and compare.
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Hi Brian, just to say that…
Hi Brian, just to say that the swing arm should be like this:
The left side arm should be welded to the cross tube at the very left hand end but the right arm should be approx 1 1/4 " from the right hand end of the cross tube.
Although I said the Model 7 was probably similar it would be nice if someone who had an ES2 could also advise you and deffinitely confirm some more details with you.
Les
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Hi, I believe that the whe…
Hi, I believe that the wheels should be laded up so the rim is central to the hub, certainly this is the case on rigid and plunger frames, the rear os the frame on these being wider on the n/s to compensate forthe drum and chain run. The obvious check is to run a string/ straight edge/ lazer through the centre of the headstock and seat post tube centre and carry it on, the center of the rim should be aligned to this. If not check that the chain is running in line as it obviously has to and once this has been established get the rim moved over on the hub by you wheel builder. However I stand on that if correct the rim should be laced central to the hub.
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Hi Brian, If you can take…
Hi Brian,
If you can take a look back through the previous messages. I have already put the measurements up for a rigid frame big 4. This is the same wheel off-set as a 1953 swinging arm ES2. If you don;t have any luck - email me on roger_deadman@yahoo.co.uk and I will measure mine for you to verify.
Best Roger
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Previously wrote: Previous…
Previously wrote:
Previously wrote:
Hello Brian. As far as I know the rims on Norton modelsshould be central to the hub, that is central to the hub spoke flanges. Only the Commando is off-set. I have an original model7 wheel, which is similar I think. The offset relative to the nearside/brake flange face is about 8mm and it certainly looks central. Check yours.
If your one has been built centrally,but it is obvious to the eye that it looks well over to the right something is very wrong. possible swingarm distortion or incorrect spacers?
Wheel builders say when a wheel is rebuilt one should always take a measurement of the old rimand note it, however I've always argued that the wheels were never built to match the bike but they were built independantly witheitherno offset or to a specified offset.
So if the wheel should have a centralised rim, Iwould prefer them to be built centrally and with no offset. If it does not line up, I will correct the problem with the bike (adjusting spacers or finding the source of the frame problem)which is surely the CORRECT way to do things?
I suppose if you cannotfind out what is wrong you will have to get them built with an offest, but I would not be happy with the entire bike if I had to resort to this method.
Les
Thanks for the information Les, this machine was abox of bitswhen I started restoring it, I felt as the engine and frame numbers were the same it was a good starting point. I am not sure what is and is'nt correct on it. The swinging arm was new and looks correct, I have tried spacing the wheel over but the brake backing plated touches the swinging arm before the wheel is central. I am at a loss as to where else to go, there are not too many ES2s here in Australia that I can have a look at and compare.
Thanks to all for the advice, I have found the problem, The so called new swinging arm was twisted by 6mm which threw the top of the wheel over. I have straightened the swinging arm and all is well, not perfect but it is 60 years old. Thanks again for all the advice
Brian
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Hello Brian. As far as I know the rims on Norton modelsshould be central to the hub, that is central to the hub spoke flanges. Only the Commando is off-set. I have an original model7 wheel, which is similar I think. The offset relative to the nearside/brake flange face is about 8mm and it certainly looks central. Check yours.
If your one has been built centrally,but it is obvious to the eye that it looks well over to the right something is very wrong. possible swingarm distortion or incorrect spacers?
Wheel builders say when a wheel is rebuilt one should always take a measurement of the old rimand note it, however I've always argued that the wheels were never built to match the bike but they were built independantly witheitherno offset or to a specified offset.
So if the wheel should have a centralised rim, Iwould prefer them to be built centrally and with no offset. If it does not line up, I will correct the problem with the bike (adjusting spacers or finding the source of the frame problem)which is surely the CORRECT way to do things?
I suppose if you cannotfind out what is wrong you will have to get them built with an offest, but I would not be happy with the entire bike if I had to resort to this method.
Les