Join Date: May 2010
Location: Rockville, MD, USA
Similiar to what Ray suggested. You definitely don't want to strap on the handlebars. I have trailered my K1300S on a Kendon on several 500+ miles trips without any issues at all.
Here are the instructions from the K1300S owner's manual:
Securing motorcycle for transport
1. Protect all components along which straps are routed against
scratching. For example, use adhesive tape or soft cloths.
2. The motorcycle can tip away to the side and fall over.
Secure the motorcycle against tipping away to the side.
3. Push motorcycle onto transport surface, and do not place on side stand or center stand.
4. Do not pinch components, e.g. brake lines or wiring harnesses.
5. Place front strap over the frame and route downward.
6. Guide the strap through the wheel carrier toward the front and tension downward.
7. Fasten straps at rear on both sides on passenger footrests and tension.
8. Tension all straps evenly; motorcycle should be compressed as greatly as possible.
2009 K1300S, 2005 R1200GS, 2004 DR650