I was wondering if anyone has ideas about this problem with my dyna. It stock, 1998, over 100k miles. Has new primary chain. I have a good friend who tips the scales to 300 lbs. The bike doesnt bottom out, but insiide the primary inside make a whining noise and just generally makes strained mechanically noises. The shock are set stiff, the beft drive with us both on doesnt feel super tight. Do you think super heavy duty shocks..or loosen primary chain? I havent tried either. What do you think. Im not carrying passenger because of it right now. Anpy ideas? And please no fat jokes. Thanks.