Mark Barnett is off the front...who's #17?

I love it when my photos are tack-sharp.  Here's the "Bomber" himself, Mark Barnett, making a quick trip around the course at a Supercross in the early '80's.

For some of you moto-historians, why not drop a comment onto the blog.  What year did Barnett run number 5 in Supercross?  That's Mike Bell (1) trying to close the gap from behind...but who is #17? Looks like he's checking out Bell's line.

Good stuff and great form from these top riders. Was racing in Supercross closer in those days?  I think so, but I observed the sport from a true front row seat - about 12 inches behind any berm I chose to call my own.