Help-How to adjust rear shocks

[lhead71]

1980 GS850G
I put new fork oil and air in the front forks and I need to adjust(firm-up), the rear shocks. They look like original shocks with a little wheel on the top, under the rubber boot, that can be turned with a screwdriver. The bottom of the shocks look like they are stepped with 5 diferent heights, and a round hole to stick something in to turn them?
Please advise and thank you in advance.

[mixongw]

The numbered wheel is the rebound adjustment. The higher number, the stiffer the shock. The steps at the bottom is the preload adjustment. The are adjusted for weight. If you are a lightweight, like me, use a low step number. If you are a heavyweight, use a higher number. I like a soft ride, so I select a step that gives the best ride without bottoming out. How much air did you put in the front? I run around 12PSI. That may a little soft for some riders but I'm gettin' old and my bones can't take the jolting they once could :-). Also, make sure both sides are set up the same or it may handle a little weird.

[lhead71]

I had about 10 psi in mine and it maked the front bounce all over the place, so I lowered it to 8 psi. It is better. I put 15 wt. oil in the forks. I weigh 210lbs. so I need a little more preload.

[lhead71]

I had about 10 psi in mine and it made the front bounce all over the place, so I lowered it to 8 psi. It is better. I put 15 wt. oil in the forks. I weigh 210lbs. so I need a little more preload.