Well, I didn't, but someone did in 1990 and it was a Norton. Anthony Daniels (C-3PO in Star Wars) stars as a priest. Vampires, British motorcycles and C-3PO? More screencaps at taliesinttlg
"This is a bad motorcycle. It runs on blood."
Here's the excellent trailer just in time for Halloween:
And an interview that includes C-3PO star, Anthony Daniels at 1:18. His character says threateningly, "Let's go and kick some bottom."