I have lower back issues as well. Cruisers don't do me well. Just like sitting in an office chair all day with bad posture. Kills my back. Stretching and excersises help. Find a good chiropractor and continue on the fun. I have a KTM300 as well as a V-strom. Love to have a 950 or a 990. Maybe someday after I get the wife a new ride.Welcome to the site Kev!
I don't know about other folks, but I have found cruiser style bikes with the feet forward to be hard on my lower back. That is one of the reasons I like the DP bikes like the GSs, KTM 990's and other "adventure" bikes. They are also easy on the knees