• Welcome to the forum website of the Vincent H.R.D. Owners Club.

    Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Online Forum Webmaster by calling 07977 001 025 or please CLICK HERE.

    You are unrecognised, and therefore, only have VERY restricted access to the many features of this forum website.

    If you have previously registered to use this forum website, you should log in now. CLICK HERE.

    If you have never registered to use this forum website before, please CLICK HERE.

Does any body know what this came off


Active Forum Website User
VOC Member
Speedo drive September 1st 2012 009.jpg

Do any of you knowlegable gents/ladies know which motorcycle this Speedo drive was originally fitted to? it has a large drive sprocket and the body diameter is also quite large, it came with some Vincent stuff but it doesn't look like a Vincent part to me, please see the attached picture
Thanks in anticipation Ben


Well Known and Active Forum Website User
VOC Member
It looks like it may have been modified to work on a vintage or veteran bike with an external (not in the hub or brake drum) drive gear. The bracket may have been fastened to the fork leg (front or rear). The cable length will give you an idea whether it was mounted to the front or rear wheel.


Active Forum Website User
VOC Member
Speedo drive September 4th 2012 001.jpg
Thanks for the reply, I should have provided more information the drive cable length is 27 inches, the drive sprocket is 17/16" diameter please see new picture
and where the drive cable connects the diameter is approximately 3/4" so it's much bigger than the 'standard' type, it's ratio is 1.5:1.
I am sure someone can put it to some good use.
Warning! This thread is more than 10yrs ago old.
It's likely that no further discussion is required, in which case we recommend starting a new thread. If however you feel your response is required you can still do so.