I promised to post this a couplr of days ago , but I've ben busy.
Unbeliveable how the workload goes trough the roof , when the puppies learn to walk!
Well , I promised you my procedure for adjusting suspension , and here it is.
Adjusting your suspension. First of all, sag and rebound should be adjusted before even hitting the trails.
Before starting , turn all compression dials to fully open (soft) and rebound about 1/3 in from fully open (fast) If your shock or fork has some sort of pedal platform damping as Fox' propedal , Manitou SPV or floodgate , turn it off. on manitou swinger use minimum spv pressure.
Sag should be about 20% for 80-100mm suspension , up to 35% for 180-200mm suspension.
With a off-road bike , you allways set sag while standing in your attack-position. For a road bike , you have to consider if you aproach the bumps you encounter in your rides sitting or standing. Use a zip-tie on your fork , and a o-ring on your air-shock. It's a bit more dificult with coil-shocks , you might just have to eyeball it. If you have a fox terralogic fork you have to stand in position up to half a minute , while the fork sinks into its sag.
Setting rebound: The easiest way to find a basic setting for rebound , is riding off a curb or a single step 2/3 of a foot to a foot high. Try to land as balanced as possible on both wheels. When you land , you should go down into the travel , then rebound ONCE, and stop. You should ideally rebound as fast as possible , without overshooting up and the down again. A gopro on slow-motion , or a friend with good eyes are invaluable when doing this.
Compression: Compression is a bit more difficult to set , as it highly depends on riding style and preferences ,wich controls you have on your shock , and the design of the suspension.
There is no easy test you can use to eyeball it , it's all about feel.
Fork: The goal on downhill bikes is to use as much suspension as possible without bottoming out on a certain track, but for general trail-riding , and for a e-bike doing higher speeds You could do with more compression to keep the wheel from getting airborne.
First , if you have low-speed compression , you use it to dial out brake-dive , and to get a stable feel when going over smooth, flowy terrain. I start fully open , and do a series of braking tests at about 10-15mph. I turn in the lo-speed dial two clicks between each brake test. until I dont feel a significant decrease of brake-dive. then I turn it out two clicks again and do another test. then I turn it one click in again. One of the three last positions usually feels best.
Find a square bump on a straight about 1/2 foot high. do a high speed run over it, starting with compression fully open. Between each run, you turn the compression (high speed if you have) two clicks in until you feel the force from the bump trough your handlebar starts to ramp up.
Now it's time to adjust the rear compression.
First , low speed compression , if you have. The idea here is to get a good balance with the front lo-speed compression. I just pump the bike up and down when riding slow (5mph) Sice you are done with the fork's lo-speed , and the rear lo-speed comp is fully open , the rear will be much softer than the front. adjust a couple of clicks in and try again. If the rear get firmer than the front , you back off a couple of clicks.
Then at last you find a nice berm , put a rock or a small log in the middle of the turn to make a half foot square bump. Then I go riding over it. If I feel the bump hard trough the handlebars or the saddle, reduce compression damping (high speed , if you have). If you feel a wheel skipping outwards in the turn , and changing my line , I use more compression damping (again , high speed if you have)on the wheel that skips.
It's important to find a nice wide berm , as it makes for a much easier recovery from skipping sideways over the bump.
A nice way to fine tune low-speed compression is to find a trail with wery flowy profile , where you go down into a mild compression. Here you will easily feel it ther is a imbalance between the front and the rear.
This is my basic procedure , but there are many more. I'll try to find some more and post up later.