Variable Rate Suspension
If you decide to do this, you're gonna
LOVE the ride of your baby when you're finished. The front spring
swap, and the rear shock adjustment, really make the 800B a sweet riding
machine! Here's the mod:
- Use the same spring kit offered by Progressive Suspension that is
advertised for the 1500 Vulcan, it's Progressive's part number #1126.
- Raise the front tire off of the ground before you begin this mod...
- The pic at the top is a picture of
the top of the front shock with the plug and spring removed. When you
loosen the Allen bolts in the top triple tree clamp, you can stick a
small knife blade etc in the grove and pop the chrome cover off. Below
that, you'll find a gold anodized metal plug with a small counter bore
in the center. That is the part used to cap the top of the shock. Using
an extension bar, screwdriver, etc., press down a bit in the counterbored
area of the plug to take the pressure off of the small internal "C"
While this "goldish" colored plug is depressed, remove the internal
The C-ring is made of small diameter wire. Once the C-ring is removed,
slowly release the pressure on the plug and it'll push itself out of the
of the shock.
- Stick a finger into the spring, and slide it out of the top of the
a rag around the spring as you slide it out to keep oil from dripping on
- The next pic above is a picture of
the stock and progressive spring. The top spring is the stock spring.
The bottom spring is the progressive spring (notice the variation in the
pitch of the progressive wound spring. On the right hand end of the
progressive spring you'll see the PVC spacer block. This is made from
schedule 40 1" dia PVC pipe. Cut the PVC pipe so it makes up the balance
of the length needed to match the original spring's free length. You'll
notice I cut my spacer about 4 3/4" long so as to raise the front end
slightly. The more appropriate length for the best ride is 4 3/8"
long, and keeps the bike at a 'stock' height. The bike can also be lowered
by cutting this spacer shorter.
- Be sure to remove PVC shavings from your spacers before putting them
into the shock tube, so as to not contaminate the hydraulics.
- Drop the new spring back in the fork tube, followed by the PVC spacer
(install the spacer on top, where it's easy to get to). Place the gold
metal plug on top of the PVC spacer and press it back into the
fork tube. Be sure to turn the metal plug so the side with the
is facing outwards. Reinstall the C-ring, and retighten the Allen bolts
the top of the triple tree. Leave the chrome caps out for now.
- Sit on the bike and look at front fork compression. Increase or decrease
the length of PVC spacers to set the front end height back to normal, or
maybe even lower it a bit..depending on your taste. Once you're
with the height of the front end, loosen the allen bolts, replace the
chrome caps, and retighten the allen bolts.
- That's it. Enjoy the new, smoother ride.
For more details
on front end lowering and spring replacement, visit LoRidr's site, on the
front spring removal and lowering of her bike, click