Hemmings Isolastics

Engie,
How hard is it getting the rear one on? Just a matter of knocking the large stud out and replacing the plate and re-assembly? Or does stuff have to be removed? Remember I've got the S exhaust.

Dave
69S

DogT said:

How hard is it getting the rear one on? Just a matter of knocking the large stud out and replacing the plate and re-assembly? Or does stuff have to be removed?

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post13432.html trinorman's post.

Thanks L.A.B. I remember that post, but that's for the MKIII isos. If I get the Hemmings adjusters, I'm thinking all that needs to be done is pull out the old shims and replace the collar on one side with the adjuster. I'm just not sure if I can do that without pulling off a whole bunch of stuff or just punching the iso stud out enough to take off the collar, remove the shims and put the adjuster on and adjust it. All my rubber parts and spacer tubes are new. Looks like I'll have to pull the lower exhaust off to get the long stud out enough. I guess the other issue is getting that threaded part on the end of the spacer tube and tightened. Anyway, I'll save it for when I bring it in this winter.

Dave
69S

DogT said:

I remember that post, but that's for the MKIII isos.

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I don't think it is?

Chuck decided to install Mick Hemmings' vernier Isolastic
conversion collars on his bike,

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I use Mick Hemmings vernier adjusters. These can be used on pre 1975 Commandos without any modification. I understand the Mark III style is easier to use though I have never seen them

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And I think you may have to move the cradle in order to install any rear "vernier" type Iso.?

You're right, he did use the Hemmings adjusters, but I don't have to remove or replace any of the inner parts on mine, they're all new. I'm wondering if I can get the threaded part of the adjuster on without a big project? Looks to me like the collar will fall off (or maybe not since it's lipped) once the stud is out of the way and the new collar can be installed. Since I have to call to buy them, I'm sure Angie will tell me.

I was wondering if anyone had replaced the collar only and what issues they had. The front looks easy except for the old stiff gaiters I have on it.

Dave
69S

DogT said:

I'm wondering if I can get the threaded part of the adjuster on without a big project? Looks to me like the collar will fall off (or maybe not since it's lipped) once the stud is out of the way and the new collar can be installed. Since I have to call to buy them, I'm sure Angie will tell me.

I was wondering if anyone had replaced the collar only and what issues they had. The front looks easy except for the old stiff gaiters I have on it.

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Well perhaps it is possible to remove just the collar and replace it with the Hemmings vernier? Mick would certainly know, however it's probably too late to call today as it's 5.30 PM in the UK.

DogT,
The theory is that it would be dead easy the practice is that I find anything to do with isolastics one of the hardest jobs to do and the most frustrating. :twisted:

There must be a simple way to support things and use a simple proceedure but I haven't found it. If I remember correctly the front bolt only slides out one way because it 'bashes' into something (I don't think it matters which side you put the hemmings adjuster on) and when the rear bolt disengages the bike starts to fall over, twist or bend in the middle depending which stand or how its supported. Even without S type pipes it is difficult to move things around, get the rubber sitting properly or get enough force on things to make a big enough gap. Thats why I fitted the adjusters, because I hate shimming. Struggle once when you can allocate the time and are in a very 'laid back' mood because you won't be when its done, and then its all over. Woopeee !

It may be that since the collar has a lip on it, the rear iso will have to be pulled above the cradle, or visa versa to get it out, don't know if I can spring the frame that much, or want to. The front will be relatively easy, just pull out the bolt, but as I remember when I put it in, it wasn't all that easy to get the holes to line up and I didn't have the cylinders and head on, plus lots of things were loose. I'm sure it will be a project, but like I say, I'll do it when I bring it in for the winter and won't be under pressure to get it done. It'll give me time to mind meld with the Norton during the cold days.

Maybe I'll make a little thread out of it.

Dave
69S