The Valkyrie likes to destroy its rear shock bushings. People like to put polyurethane bushings here, so they last. However, this produces noise. You can keep regreasing the bushings, but maybe the grease will ruin them. These replacement bushings are made of polyurethane with a Teflon PTFE nanopowder mixed in. The Teflon reduces the friction so that the bushings don't make noise.
How do I get more detailed information on this?
Red Eye's informational web page is still under construction: www.ValkParts.com .
How do I know I need this?
Maybe your original shock bushings are shot, or maybe you already have some polyurethane ones but you find the sound irritating.
1. Put the bike up on a jack and remove the rear shocks.
2. Try using a vise and a ratchet socket to push the bushings out of the shock eyelets.
Note: For the lower bushings, remove the metal sleeves first
If that doesn't work, you can grab the edge of a bushing with needle nose pliers and twist until the bushing collapses and comes out.
3. Use a vise to push the new bushing into the shock eyelet. You may have to poke at the edges of the bushing to get it started into the eyelet.
Once the bushing gets past halfway into the hole, it will pull itself the rest of the way in and center itself in the eyelet. I wasn't expecting that.
4. The lower bushings get their metal sleeves reinstalled now.
5. Adjust the jack height so the shock mount points are the same distance as the length of the shock.
6. Clean off the top mount, getting any dirt or grease off.
7. When installing a shock, it is convenient to install the lower bolt first. Then push the upper end onto the top mount. The upper bushing will actually slide onto its mount, with very little fuss. Do not lubricate.