I've owned a few BSA 500 singles, Ducati 450 singles, a number of British twins, a Husky 510, and a bevelhead Ducati 750. Plus I worked at a Brit bike shop when I was in college, so I'm used to kick starting hard to start bikes. I've found the issue is technique, and not brute strength or weight. Also, the bike has to be in a good state of tune. Even then, my old knees are not what they used to be. I finally gave-in five years ago, and installed a CNW e-start kit on my Norton Commando.