saw this on r1-forum and figured it would be helpful for all of you guys looking to adjust your suspension.
credit goes to DanQ for the write up. HOW TO: Motorcycle Suspension Setup 101
Suspension setup basics:
- Static (Rider) Sag: The amount of suspension travel used by the combined weight of the machine and rider, measured from topped out.
- Free Sag: The amount of suspension travel used by the weight of the machine alone, again, measured from topped out.
- Damping: Damping is simply the components ability to dampen the oscillating energies that the suspension will be exposed to.
- Compression: The damping that controls the downward stroke of the suspension. At the bottom of the forks and the top of the shock (typically).
- Rebound: The damping that controls the upward (return) stroke of the suspension. At the top of the forks and the bottom of the shock absorber (typically).
- Stiction: This is the drag placed on suspension components due to friction, drag, linkage and other moving parts of the suspension. DO NOT be surprised if this is a large amount as in the Kayaba forks used in the YZF-R1 and ZX10R. This is normal, and these forks are capable of performing extremely well.
- Rake: the angle of the steering head relative to a line perpendicular to the ground.
- Trail: the distance from the point axis intersects with the ground to the tires contact patch directly below the axle.
Tools needed - Generally, simple hand tools that come with the motorcycles tool kit are mostly all that are needed, but as with anything, better tools will make the job go smoothly, and include:
- Flat screwdriver
- Various box end wrenches (preferably six point)
- Various sockets (preferably six point)
- Spanner wrench for rear shock preload
- Tape measure or ruler (metric)
- Zip ties
- Stands (the Baxley type is GREAT for this)
- Notebook or data sheets similar to those by Dave Moss at Feel The Track! Catalyst Reaction Suspension Tuning