Triple trees/yokes differences

There are differences between the 750 triple trees/yokes of 1968/70, 71/73 and  850 73 onward?
Ciao
Piero

Yes. Big differences.

Haven't we had this question before, recently ?
Very recently.

This question just highlights the need for a more involved technical details area.
Somehow work with LAB and Jerry to compile the data and present it in a friendly interface.
Trying to cover all the common repeated questions, kind of a read this first area.

Covering things like:
Frame differences
Head differences
Yoke differences
Cam differences
Piston differences
Serial number ranges and what they mean
possibly also a section for known and accepted modifications.
listing of universal part numbers for items like bearings and seals, etc...

I have notes myself, but they are mostly hand written and scattered throughout several folders of paperwork.

Pierodn I believe it's 27 degrees for the 750, and 28 deg for the 850.

OK, the 68-70 front yoke has the tube attached to the bottom yoke, like mine. If you need part numbers I can get them.



The 71 and up the tube is attached to the top yoke, I think, I've never seen one. You can see them on the Old Britts site. I don't know anything about the 850's.

http://www.oldbritts.com/1971_g11.html

So, yes they are all different.

Dave
69S

Can you use an 850 one in a 750 frame?

Oh, that 68-70 yoke picture is for the "halo" headlamp mount. I'm not sure what they did for the 68 before the halo. I think only the 69/70S, 69/70R and 69/70 Roadster had the halo mount. The rest had 'ears' as far as I know. The 68 probably also had 'ears'. So there was probably a different part number for the yokes from 68 to 69 (mine is Apr 69, but registered as a 70, so call it what you want). I hope that's confusing enough.

Dave
69S

pierodn said:

There are differences between the 750 triple trees/yokes of 1968/70, 71/73 and  850 73 onward?
Ciao
Piero

Click to expand...

This is a good thread that covers the evolution of the triple trees from Atlas to 850. Some posts have links to other threads that expand on how to go about changes and why it might not be a great idea. Or, try a search on 'yokes' and some Jolt Cola. Dig in for a long haul.

fork-yokes-triple-trees-t8769.html?hilit=early%20yokes%20fork%20stops

bwolfie said:

This question just highlights the need for a more involved technical details area.
Somehow work with LAB and Jerry to compile the data and present it in a friendly interface.
Trying to cover all the common repeated questions, kind of a read this first area.

Click to expand...

Check out how the NOC went about it. Some issues might come up if Les or Jerry did more than make an easily retrievable list of what members have posted as possible solutions to specific problems.

http://www.nortonownersclub.org/support ... t-commando

850 top and bottom triple clamp have "ANG" in the casting on the bottom side...750's do not.