Front isolastic mount

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fireflake

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Hi, most probably a dumb question but I've replaced my original mount, '69 S with another one from Ebay and notice that the right tube ( where the adjustment is made) is longer than the left, can anyone offer an explanation please, David
 
It's because the engine (cradle, gearbox) is slightly offset to the left of the frame centre line.

(Note that the tube lengths of the 850 Mk3 front Iso. mount are equal length, as the Mk3 vernier adjuster collar that fits at the right-hand end of the assembly is wider)
 
Thanks for the reply. I take it then, one can't fit the vernier set up using the earlier mount which has the longer tubing, David
 
Not the Mk3 type unless you get the tube machined to match or buy the vernier type ready modified to suit pre Mk3 tube. Takes about 5 mins to shorten the tube in a lathe.
 
fireflake said:
How is the vernier modified
Click to expand...

Mk3 front Iso. (requires tube to be shortened if fitted to a pre-Mk3 mount)
Front isolastic mount


Pre-Mk3 vernier conversion. Fits without modification.
Front isolastic mount
 
If you are in the UK then PM me and I can shorten your tube on my lathe if you pay the postage both ways. If you are not in UK then get someone to shorten the long side so it matches the short side in length.
 
Many thanks for all the advise and offers of assistance, I'll go and check which version vernier I have as I purchased my Norton as a basket case ( not unlike myself)
 
Hemmings adjuster, fits on any of them. No machining required. I have a set.
 
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