Steering damper needed

[Randomwrenching]

Hey crew...

Looking to find out what steering dampers would work for my 1985 GL1200A. I had a trike kit put on, and the bars shake at a low-ish speed. (Didn't before the kit was installed) Like at 37-40 kph. It doesn't shake below or above that speed range.

Tire is new and balanced, I've messed with tire and suspension pressures, and the steering stem bearings were greased and adjusted to about 5 ft/lbs over stock. Stock clamps are still on it, no angle adjustment was done to the forks. Just to answer some of the questions that would be asked first.

Thanks for any help offered.

Don

[Rambozo]

What kind of trike? Sounds like maybe the rear alignment isn't spot on. Just about any universal damper will work, but you will have to fab the mounts. I don't know of any bolt on kit for that bike. Adding a damper is usually not the right way to fix that. I'm not sure if easy steer currently makes a kit for that bike, but they might have in the past.

[joecoolsuncle]

yep, how about pics, and info of the manufacture? does it have a differential? trikes and side cars are inherently harder to setup for best performance, and starting with unknown or worn equipment is a big no-no. that headshake can kill you quick!

[Randomwrenching]

Thanks for the replies!

I have no pictures, but it's an outrigger (training wheels) kind of kit by an unknown manufacturer.

Alignment is straight, it has torsion style axle ends for suspension.

Steering bearings are checked (fine), greased and torqued to 5 ft-lbs over stock. Swing arm bushings are fine as well.

4.80-12 tires on it, but inflated to max pressure. Maybe I'll drop them down from the max inflation which is 80psi down to 40psi. No need for max pressure if they aren't under much of a load.

The shake only happens at low speeds.
Within a couple mph right around 20mph. Nothing above 20mph up to 60 mph.

[joecoolsuncle]

when you say trike, you throw everyone off. a trike has three wheels. do you physically need the outriggers in order to ride? any thing that affects handling is dangerous. you really need to resolve this before riding. one downhill or fast sweeper or rain grooved road or bridge may be your last ride.
find a competent shop to look it over and address the fault. i would start with removing the kit, making certain there was nothing damaged during install, see if it in fact still does not shake, not even a little bit.
then start with making sure the outrigger tires are true, then the axles, then the frame. once you know the kit is perfect, then move on to a professional to install and tune it. probably a good time to replace the rear tire while at it, as that kit has to come off every time the rear tire needs repalced, which is more often with the kit installed.
peace