Firstly you need an assistant, put a cable tie around 1 fork leg and a small piece of masking tape on the seat cowl directly above the axle
With the bike upright and the rider sitting in the riding position push the tie up the fork leg as far as it will go . dismount. Now lift the front until the forks are fully extended, measure the distance from the top to the tie, should be about 20mm, adjust preload up or down until you have that measurement
Now go to the back, lift the rear so that the shock is fully extended and measure the distance from the centre of the axle to the mark you put on the tape, now with the rider sitting on the bike measure the same distance, it should be about 15mm,adjust the preload until you have that measurement. Now go for a ride, does the bike hold a line but needs a lot of countersteer to turn in, if so reduce the preload on the front, 1/2 turn at a time until it only needs slight pressure on the bars for it to turn in. If it falls in too easy then apply more preload. Just make small adjustments at a time . then adjust the compression and rebound damping to get the ride you want
Last edited by OldBobagain; 02-10-2020 at 12:17 AM.