Front Iso - strange?

seattle##gs said:
With the motor resting on the iso, the gap at top is smaller than the gap at the bottom so I split the difference.
Click to expand...
Not if you have (as I have) a properly adjusted pair of Mk3 springs on the top iso (Dave Taylor)
If I loosen the through bolt, I can slide it back and forth with my fingers.

...and thinking again, even if you don't have the springs, what you said is not correct.
Downward vertical load will deform the rubbers in the large tube but the iso washers themselves see no vertical load. The gap will be the same top & bottom - unless you have something else going wrong.
 
Have reassembled and done a forty mile ride and am happy with the result!

I should mention how I have stopped a recurrence (for other's sake)
I noticed the the left hand "abutment" (the outer "nut" on the left) had an empty threaded hole for a grub screw.
I also noted the outer 6mm of the inner iso tube was not threaded. https://andover-norton.co.uk/en/shop-details-2/16710/isolastic-rubber-front-mounting
So, noting the position of the grub screw hole when fully tightened, I filed a substantial flat in the 6mm.
Then found a button head screw to fit in the grub screw hole and cut/filed it to suit.
Used loctite blue on this screw and - hey presto it will not come loose again.
Now... what's next? (...as we know with these machines that we love - there's always a next)
Cheers
 
I use the AN version on MK3 and their version for pre-MK3.

I tighten the set screw very tightly and with blue locktite, but every time I wonder why I don't just use locktite on the stationary end as I can't imagine why I would ever need or want to remove the stationary end. AFAIK, AN does not sell the individual parts for the pre-MK3 front so there's really no reason to ever unscrew it. They do sell the individual parts for the MK3 but don't say which are different from pre-MK3 and which can be used to replace parts in the pre-MK3 kit.
 
L.A.B. said:
I searched 'vernier'.
Click to expand...
I guess I should use search for more than part numbers! I generally go to the basic year I'm looking for and I checked them all before I posted - that's why I said AFAIK.

Simon can expect a "suggestion" email when he arrives Monday! He generally fixes/has fixed anything confusing that I tell him about.

Now I'm wondering what the difference is - I have both and have installed both and have never looked into which parts are different in the MK3 and pre-MK3.
 
L.A.B. said:
The pre-Mk3 mount tube is longer so the pre-Mk3 adjustable collar is thinner.
Click to expand...
According to AN, the only difference is the abutments and adjuster collars. The web site is being updated so it's easy to find them in the drawings and lists.

MK3:
06.5514 (Abutment)
06.4665 (Adjuster Collar)

Pre-MK3:
06.5514/1 (Abutment)
06.4665/1 (Adjuster Collar)
 
To close my side of this thread - I was dreading what I might find in the rear iso - much harder to fix!
Good news, there was a grub screw fitted and, even better, there are witness marks on the inner tube that show nothing had moved.
Cleaned it all and re-installed (very tight) with loctite 243 (blue)

Now, onwards and upwards!
Cheers
 

Similar threads

Big_Jim59
I Feel Done (and It's Really Strange.)
2 3
Replies
45
Views
1,654
robs ss
robs ss
T
MKIII clunk in front suspension
Replies
16
Views
525
DennisMo
D
D
What is the length of the sliders inside the Commando front fork ?
Replies
4
Views
361
Stevo
Stevo
baz
Strange world we live in
2
Replies
26
Views
1,136
TomU
TomU
Bonzo
Did the front Isolastic conversion today.
2
Replies
30
Views
2,064
Bonzo
Bonzo
Back
Top