The 8mm shank bolts are listed in the service manual for 25.5lb-ft but that is wrong. They should be 16.5lb-ft. The reason they were so stuck is Suzuki has been using thread locker. Heat will loosen that.

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Pat- 2007 DL650A was ridden to all 48 contiguous states. 2012 DL650A is just getting started.
Nicknames for posting ease on my part, Vee = all DL1000s. Wee = 2004-2011 DL650s. Glee = 2012+ DL650s