mechanical tacho drive

Post by: **SJ Lambert** » Sun Dec 22, 2013 6:52 am

Here's what the original boss looks like.

Post by: **SJ Lambert** » Wed Dec 25, 2013 10:19 am

Post by: **john.p.clegg** » Thu Jan 09, 2014 9:29 pm

Is this any help

http://www.ebay.co.uk/itm/Formula-Junio ... 2a363b0d53

John :wink:

Post by: **SJ Lambert** » Tue Apr 07, 2015 6:14 am

I'm thinking Loctite 518 to seal the boss onto the cover and the gearbox onto the boss?

Post by: **SJ Lambert** » Tue Apr 07, 2015 9:01 am

Put a sleeve over the driving shaft - just in case........

Post by: **SJ Lambert** » Tue Apr 07, 2015 9:03 am

Post by: **elj221c** » Thu Apr 09, 2015 8:25 pm

SJ Lambert wrote:
P1100989.jpg

Put a sleeve over the driving shaft - just in case........

In case of what?

Could restrict 'slip n slide'.

Never heard of a drive failing there....

What's with the big lump of alli?

Drives that I have seen all bolt straight to the cover.

Post by: **SJ Lambert** » Fri Apr 10, 2015 12:48 pm

The magnesium boss gets the driven shaft of the gearbox back far enough away from the jackshaft so as to mesh properly with the driving shaft and the gearbox itself also clears the water outlet on the front cover and allows the cable to be routed forward to the the dial - just slavishly copying the original set up!

mechanical tacho drive

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