Harisons Speedo Drive Gearbox for 850 MkIII Commando?

L.A.B.

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Has anyone heard of a Commando speedo drive gearbox apparently made by a company possibly called Harisons (Rebullet?)
As there is one shown on eBay at the moment that supposedly fits rear disc Commandos (850 MkIII) Triumph? (T160?) BSA?.
View item:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=014
Are they:

Good?

Or cheap/nasty/unreliable?

Are they available to buy anywhere? Or are they pattern parts that are no longer made?
 
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I've never heard of them L.A.B. It doesn't say R.E. Bullet, does it ? That might indicate Indian origin !

Harrison Billet make those nice brake calipers but I'm sure it's nothing to do with them.
 

L.A.B.

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Thanks 79x100 I will check that.

Yes could be *R E Bullet*.
That could be useful to know if the Enfield speedo drive fits a rear disc Commando and Triumphs etc.!

Anyone heard if that is possible?

After seaching through some images there does appear to be a similar drive gearbox fitted on the Enfield (India) right hand side of the front wheel.
 
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Just check that the drive gearbox has the same revolutions per mile as your speedometer. The Commando (for what reason I never discovered) changed the display instrument from the usual Norton standard of 1600 revs/mile to 1000 revs/mile. Unfortunately, the hub drive supplier didn't get the word for a while. Most of the time we were testing the prototypes, the speedometer read 1.6x actual speed.

If I remeber correctly, there's a small-typeface part number at the 6-o'clock position on the speedometer and the last four digits are the revs per mile.
 

L.A.B.

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Thanks Frank. I don't know if this unit has the correct 15:12 drive ratio or not (or if the direction of rotation is correct or not?), but I shall endeavour to check.





frankdamp said:
If I remeber correctly, there's a small-typeface part number at the 6-o'clock position on the speedometer and the last four digits are the revs per mile.


Yes I have that info (see my instrument ID thread) http://accessnorton.com/norton_commando1440.html
 
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