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Library Home Page > 1st Generation (1983 to 1993) > Suspension
Removing The CLASS System
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Removing The CLASS System

I was so fed up with the CLASS system on my 83' Royale that I just by passed the whole system and installed regular air valves. Want to know how? You need the following parts; 2 X pressure fittings that go from 1/4 (outside diameter) on the pressure fitting side to 1/8" female (inner measurement to accommodate the tank valve or sifter valve) Bumper to Bumper PT# WHT66X4
2 X 1/8" N.P.T. air compressor tank valves or sifter valves as they are sometimes called. Bumper to Bumper PT# MTNS684 Remove the rear bags and trunk, remove the seat and air compressor cover.    Locate the air out lines from the compressor, there are two (one for front & rear suspension) they are on top the compressor and use a round fitting with a bolt through them. Remove the air lines from the compressor.  Cut the fittings that were connected to the compressor off the air lines. By trimming the cut ends of the air hose to a tapered point it makes it easier to slip the coupler on the line.  Slide the hose fitting over the air hose and then the pressure coupler, this will be difficult as the fit is very tight, once I got the coupler going I GENTLY used a pair of pliers to help slide the it down the hose with a clockwise threading motion. Because the coupler is so tight to the air hose if you put the coupler on properly (didn’t cut into the hose) it should sit straight.  Once you have the coupler down the hose far enough, remove the taper from the air hose and make sure it’s a clean even cut and the hose looks good.   Use a thread sealer (I just used lock tight) and screw on the female end of the fitting. Make sure the coupler is sitting straight on the air hose or you’ll damage it when tightening the fittings.   Use thread sealer again and screw in the tank valve.  Repeat for other hose.
That’s it, pretty easy. Test your fittings by pumping up the suspension and draping the fitting into a bucket of water, if you have bubbles it didn’t seal right. I also cut holes in the compressor cover for the bike and ran the hoses and fittings up through the cover so I can get at them just by removing the trunk. All I need is an air compressor and a tire gauge and I can dial in the front or rear suspension as I want. I may even get more ambitious and rig up the bikes compressor off a power switch (it still works, only part of the CLASS that does) and run an air hose off it so all I’ll need is my trusty tire gauge. I may not have CLASS but at least my suspension works!...........Rod Hollman

Last update: 03:28 PM Sunday, September 26, 2004

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