Join Date: Aug 2009
Location: Washington, the state
The purpose of the preload is to get the loaded bike in about the middle of its suspension travel. It sounds like you need to raise yours or maybe rebuild the hydraulic preload adjuster (just a leaky o-ring).
Do this--turn the preload adjuster and see if the top spring mount on the shock raises and lowers. If the knob won't turn, search this site for ways to free it up. If it turns but the mount doesn't move, you need to fix that leaky o-ring. If it raises & lowers, you're ready to set the sag.
Raise the rear wheel off the ground and measure from the axle to a spot on the rear fender. You probably need a helper. Get on the bike, straight up & down, tip toes just brushing the ground, and have the helper measure the same points again. You want about a 40 mm change in the measurement. Crank the preload knob to get that 40 mm. Measure again to be sure.
Same idea for the front. Use a cable tie around the inner fork tube. Front wheel off the ground, slide the tie next to the seal. Get on, jiggle a bit to settle the suspension, tip toes on the ground, get off, wheel in the air, measure how far the cable tie got pushed down the fork tube. Use the screw slots in the top of the forks to make a change to get the tie to a 40 mm movement, test again.
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