Right, the original model was from Holo from somewhere of the internet.I deleted the bad surfaces only, because in the old discussion the argument was, the bad objects cause the slow down.
I afraid I was more a pain in the neck with the bike model posts, so people think it’s my bike. 
Steve, great, I hope you find the reason for the speed difference between NURBS and mesh only display mode.
Here is the old link:
www.simulacrum.de/download/Testmaxspeed001.rar