Thanks for the posts,
Foot Dragger, as far as basic spoke pattern goes, I've relied pretty heavily on this post by Woody,
My 21" wheel has that exact Japanese pattern.
I have closely looked at both my new Excel 19" rim and the bare KTM hub I am trying to lace together.
Both hub and rim seem to have this exact same Japanese' pattern as well. It looks like I could easily replicate the lacing from the 21" to the 19" wheel so long as I had the correct spokes.
If I am right in this observation, whether the actual angles of the holes line up perfectly would depend on the diameter of the hub (where the spokes start) this rim was intended for (a rear hub)...
After playing around with it, it doesn't look too bad to me- might be spot on or not far off.
From measuring spokes, it looks like the 21" wheel has spokes around 235mm and for the 19" wheel/hub I would want then around 205mm.
approx measurements of
holes in hub = 5.1mm
holes in rim = 8.7mm
Googling around brings up tons of spoke sets but hasn't helped much trying to figure out how long these spokes actually are...
I'm done for the night.