I had read-over a few threads that casually mentioned some clutch slippage problems. Heavy trike or tricked-out engine could equal clutch problems. I have a TC 88 kicked up to the Stage II 95 kit and a few other high performance enhancements. It runs "real good" even as a trike plus the wife and all her baggage. The Stage II upgrade came with the SE clutch spring, but I think HD has dropped the SE spring in newer upgrades. The stock spring works just fine, until you load it up. You can change your spring, but you bring-along the increased effort it takes to pull the spring. I installed an AIM VPC (variable pressure clutch) on top of this SE spring and I can pull my clutch with two fingers. My wife can pull my clutch and I bet my cat (Porch Kitty) could pull it if she had hands. You do not have to change the strength of the stock spring you have now. This vpc is designed in such a way that as RPM's increase, the pressure applied to the diaphram spring increases and locks-up the clutch. It was designed for racing applications where they run springs with pull-weights of 400 pounds and better.
This gizo changes the point at which the spring is engaged and can be had in three strengths to suit your needs.
It installs in 15-minutes flat and you will not need any new gaskets or loose any primary fluid.
No....I do not work for AIM, never did and never will.
I just know a good thing when I see one (and use one). EASY PULL, NO SLIP, 15-minute install. Stop fooling with your diaphram springs!