What I've been able to find is that the 11 31 8 528 385 is a superseded part number for the original belt.

So I ordered a new belt fro Capital Cycle in Virginia.

What I got was the exact same flat 4PK582 belt.

Here's a picture of the 2 belts. You can see that the old belt has deep V ribs, but the ...

Howdy everyone.

I've got an 2007 R1200RT (date on the plate says 0507) and I'm confused about the alternator belt.

Supposedly, a Contitech 4PK582 belt is the correct one, but I ordered a couple and installed one without checking too carefully. Went riding, and it appears the the belt walked off ...