At what rpm range should my tc 103 smooth out? It shakes less at idle than it does between 1700-2700 like to the point I hold both levers because it shakes. I’m not new to Harley’s I know they shake at idle and smooth out at speed but I seems like mine doesn’t. My last dyna wasn’t bad and this one wasn’t bad at first.

 

Check the clearance between the front mount and its bracket. Here are the two parts folded apart.

 

 

It’s on its second set of mounts

 

Brayfield,
I just changed my front mount. Based on advice from this forum I mounted the two components, made sure the frame was vertical and the engine was aligned so that the holes in the two mount sections were perfectly aligned, and looked at the distance between the frame mounted section and the engine mounted section. They should almost touch. If there is a visible gap it should be filled with washers so that the rubber in the mount is not pre-stressed.

 

It is my belief that if there is a gap it means the rear mount is stretched out, allowing the whole drive train to shift aft. I would replace the rear mount at the same time and not add any shims in front. TMSAISTI!

 

I had a vibrations and took it to a shop and they replaced both mounts, seemed stiffer afterward still tolerable but not it’s miserable to ride , you have to keep it in certain spots to keep it decent. Probably gonna take it to a local shop again. Just frustrating

 

Just three thoughts on this:
1) I read somewhere that the 103 is happiest at about 3,000 rpm. Certainly, I don't usually ride my Low Rider in the 1700-2700 rev range. I prefer 2,800-3,200 for cruising, and higher if I'm in the twisties.
2) My Low Rider developed an unpleasant vibration and shake under deceleration, especially when coming to a standstill. I had the front mount replaced but it made no difference. I then had the head bearing replaced, and the vibration disappeared.
3) The Switchback was renowned for vibration at about 2,800rpm; it turned out to be the way the exhaust was mounted. I don't think that was a problem with the model you have, but if it has an aftermarket exhaust, it may be worth experimenting with the way it's mounted.

The problem with your bike may be different, but it may be worth exploring these possibilities. I hope things work out for you. May you be blessed on the road ahead.