Has anyone done a spoked wheel conversion like Robert Lincoln's lately ?

I've got XS650 wheels on my XV920R now, but note that while Robert Lincoln says you need 7mm spacer on the rear sprocket, Kevin Emery says it should be 12mm.
Which is it ?

I'm hoping that 7mm would do the trick as I think such a spacer could be made from an old sprocket.

Hello

As explained in the thread above the spacer should be 12mm as measured on my bike. That is the critical bit. I am sure all Tr1's built may be slightly different. Put the wheel on the bike and measure the offset between the main engine drive sprocket and the sprocket on the rear wheel. Whatever that measurement is that is what your spacer needs to be.

Regards
Kevin