I had cervical bone spur surgery 6 weeks ago through incision at top of back. Scar area still gives some pain. Is it ok to ride a motorbike?

Motorbike. Motorbikes are dangerous. Whether it's ok to ride one 6weeks after spinal surgery and why the scarred area is so painful is best answered by the operating surgeon. I'm sure he/she will want to examine you in view of the postoperative discomfort at the surgical site.