Tuesday, December 10, 2013

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How to Tweak Progressive Motorcycle Shocks

How to Tweak Progressive Motorcycle Shocks

Progressive Suspension shock absorbers are adjustable to preset loads and they can also be adjusted to achieve clearances on modified motorcycles that might not be allowed by original equipment manufacturers shocks. Progressive Suspension advises customers to check clearances around the shocks before installing them on any motorcycle. When necessary, the top cover can be removed. Progressive Suspension shocks can be completely disassembled with a spring compressor but the manufacturer does "not recommend" the use of lowering blocks and warns that use of a lowering kit may damage the shock and void the warranty.

Instructions

    1

    Remove the domed caps on the shocks by pushing the cap from the back, with your fingers, out of the eyelet cover. Reinstall the domed caps, when clearances allow after installing the shocks, by pushing them back into the eyelet covers with your fingers.

    2

    Rotate the offset lower shock eye in or out with your hands to gain clearance advantages.

    3

    Remove the upper cover on the Progressive shock by loosening the 2 retaining set screws with a .050" hex key. Further disassembly requires special tools.

    4

    Adjust the 5-position preload adjuster with a spanner wrench. Engage the wrench tabs into the two opposing holes in the lower chrome cover and squeeze.

    5

    Rotate the lower chrome cover left to increase spring preload and stiffen the shocks. Turn the wrench and the chrome cover right to decrease spring preload.