A nice cut-tho’, courtesy of ADAC. By tapping around in the ADAC website, you can find all sorts of very good routes.
https://www.adac.de/reise-freizeit/reisen-motorrad-oldtimer/motorradtouren/deutschland/allgaeu/
Some more, from what I think is some sort of local tourist office. Whatever it is, they like motorcycles.
https://www.allgaeu-motorrad.de/
10 from a German motorbike magazine.
https://www.motorradonline.de/reise...im-allgaeu-motorradtouren-in-sueddeutschland/
Even the local insurers have ideas, scroll down for the very clear map, displayed on Kurviger.
https://www.hdi.de/privatkunden/versicherungen/kfz/ratgeber-motorrad/touren/allgaeu-bodensee
Can’t be arsed? Here it is:
https://kurviger.de/motorradstrasse...nt_title=Balderschwang&layer=Kurviger Liberty
A hands-on, real life (much favoured on UKGSer) blog type site, with 24 jaunts all starting and ending at Sonthofen station. 8,500 km if you ride the lot.
http://www.motorradrudi.info/Tourvorschlaege-von-Sonthofen-Allgaeu-aus.65.0.html
Local ‘biker friendly’ hotels, from a tourist organisation.
https://www.deutsche-alpenstrasse.de/en/home
Some more and more besides, if you tap around a bit:
http://motoalps.com/de/touren_id-16.html
Our friends at Louise.de get in on the act.
https://www.louis.de/fuer-die-motorradreise/tourentipps/deutschland/alpen/allgaeu
A biker friendly hotel, has their contributions, too:
https://www.schwabenhof.com/motorrad/motorradtouren/
The so called, ‘German Motorcycle Route’ or MSD takes in the area, not surprisingly. See the sticky.
https://www.motorradstrassen.de/regionen/allgaeu-bodensee-schwaebische-alb
Another biker friendly hotel has their suggestion:
https://www.hotel-anneliese.de/motorradtouren-im-allgaeu/
All found, just by Googling: Allgau motorradtouren. Only two words and then just tapping on the sites thrown up by Google. Use the instant translation offered by Safari or guess what the words must mean. If I can do it using nothing more than an iPad, anyone can.