An online brochure I found says the CSS-100 only supports VSS up to 8,000 pulses per mile. So I assume you'd need a divider for the original CSS-100 also, yes? Also, what is VSS, where does one get a "divider" and how does one wire it into the VSS?
Since no one responded to this I will help out here.
VSS = Vehicle Speed Signal.
Basically the old 1100 had a mechanical cable that spun and connected to the back of the dash to work the speedometer. The 1300 is all electronic. There is a wire that has a pulse of power that then goes to a stepper motor to move the speedometer needle. In the newer cruise controls they tap into the VSS wire to get the signal for the speed. Then electronically run everything. The problem is that the pulse rate of the 1300 is much too fast for these cruise controls to properly read the signal. A signal divider is basically a filter and it sits between where you tapped into the VSS and the cruise. If you have it set to 1/2 it only lets every other pulse through. If you go to 1/3 only 1 in 3 get through so on and so forth. That is why it is called s signal divider. It divides up the pulses only letting a fraction through and gets the pulses per mile down to a level that the cruise can understand. I haven't had to buy one so I couldn't say where to get one for sure but one could be made, there isn't much to them. Or a Google search will likely locate one.
I have done an install of the older vac version but not the newer electronic. I am debating now on doing one on my 1300. On the older one you tap into one of the coil packs for RPM and then it uses Vac power to run the device. The problem is that you are taping into the vac system which can introduce leaks. Also the fact that the vac system isn't that big on the bike means that if you come to a really big hill, at times it doesn't have enough vac power to pull the throttle open enough to maintain speed. It is fine for small rolling hills but bigger ones are a problem. The way to fix this is to make or buy a small vac tank to act as a supply of vac to assist the system. You add a check valve so you don't loose all your vac everytime the engine is stopped or in low idle conditions. Some have gotten by with adding a bunch of vac line which is another option.
Bottom line is that the advantage of the VSS version is that there isn't the chance to a vac leak, and no issues on hills but you have to mess with a signal divider. The advantage of the vac is that it is well documented on the install as it is a popular farkle. They work as long as you address the vac tank or extra line and are careful in splices.
Hope that helps clear things up a little.
