The instructions are crap to be honest. They are as follows:

* Push bar through the hollow spindle
* Place black bobbins on each end of the spindle bar
* Fit washer and nut loosely onto each end of the bar
* With a socket on either end, tighten until the assembly locks into place
* Do not overtighten - the nyloc nuts will hold it tight

At no point does it mention plastic spacers.

I'm going to hazard a guess now that the early XTX's had different fork legs from the newer models. Can anyone confirm this?

If this is confirmed then I don't understand as they were purchased from someone with the same model as I have and they said they fitted without any problems.

Surely someone out of the hundreds of members on here has pics of their bobbins fitted and can assist here?