My motorsickle policy has a tow/roadside rider. Reimburses me for tows. Check if your current insurance can write this type of endorsement too.

Regarding your question, the BMW Motorcycles of America list them on their website

Quote:

MOTORCYCLE BREAKDOWN Insurance

Euro and other overseas riders with breakdown and 'repatriation' coverage provided by their national auto clubs (e.g., ADAC, AA, RAC) will not get equivalent specialized motorcycle service from the US auto club, AAA. Specialized motorcycle breakdown service (towing to nearest dealer) is available for the US and Canada from:
Motorcycle Towing Services, Inc (MTS) +1.319-984-6124 [US 800-999-7064], fax +1.319-984-6132; mtstowing@mchsi.com, www.mtstowing.com ; 105 North State St, PO Box 559, Denver IA 50622 USA



Some other links I found...
MoTow Motorcycle Roadside Assistance Is another option provided by the AMA.

The AMA Roadside Assistance program includes the "MoTow" service, providing emergency assistance to AMA members and the International Helping Hands program for members to help other members during emergency breakdowns 
|  The Bros Club is one of the oldest motorcycle roadside assistance programs in the U.S.A.; they have a trip mapping service and also sell motorcycle insurance  | | 

|  The Motorcycle Rider's Foundation has a roadside assistance program through the
Road America organization  | 
Motorcycle Rider's Association roadside assistance insurance program 

European - U.K. Motorcycle Roadside Assistance Programs:
 Vehicle Rescue Direct provides breakdown assistance across Europe for U.K. residents  | 

Britannia Rescue also covers motorcycles

Blowing gravel off rural roads