Servicing a rear shock from an R6 today. Check out the oil.... It's soooo full of gas that it looks like champagne! It's not going to be doing any damping in this state. You're essentially riding around on the spring.

Most OEM shocks are actually pretty good when freshly serviced. But they leak gas into the oil over time, so they end up with almost no gas pressure and badly aerated oil. Both mean they aren't doing much damping.