Whenever I ride my bike, my laft shoulder starts to hurt. I am totally relaxed on the bike, my right arm doesn't hurt, but my left one gets so bad that I can barely move it after a long ride. I am not sure if it's muscle pain or loss of blood pain or what, but it pisses me off. I was fine on my other bike, then I wrecked it and got this one and have been having this problem ever since. Anybody else ever have this happen?