In the "less expensive" category of rear shocks, it seems we have these options:
1. a shock with no adjustments; set damping and preload - $
2. a shock with preload adjustments - $
In the "more expensive" category, it seems we have these:
1. a shock with damping and preload adjustments - $$$$$$$$$$$$$
2. a shock with psi and oil adjustable, adjustable preload, adjustable everything, auto-adjust - $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
It seems like you can get the Chinese no-name shocks for the smaller bikes but not for the large/heavy bikes. Maybe they work fine for the money, maybe not. Then you can get the expensive name-brand ones but are they really, truly many hundreds, if not a thousand dollars better than something else?
And who really makes the shocks for Harley Davidson, or Yamaha, and where do they source the parts to build them?
There needs to be more options between $ and $$$$$$$$$$$$$$$$$$$$$$$$$$ for heavier bikes and classic bikes but it seems cheaper to get your nice suspension by just getting a newer ride! A riding buddy of mine raves about his BMW. Everything just works and works automatically.