Don't understand your logic at all. Years ago, I put an indicator on the pressure plate and adjusted the center adjuster at 1/2 3/4 1 Full turn. As long as the cable play was the same the plate lift was the same.. I personally prefer 1/2 on most my bikes because it requires less adjustment.of the cable. I can see where 1/8 requires less adjustment of the cable. The only thing that changes is the position of the ramp arm. I suspect that going smaller off bottomed places the arm closer to 90 degrees when the lever is pulled in all the way making the hold in pressure less.

How does heat hurt things? The plates swell and pressure is released on the throwout bearing..

FWIW I've killed one throw-out bearing in a few hundred thousand miles of different HDs type bikes. The one that died was on my 113 ci evo bobber with 3 inch belt primary after about 50000. Some of the reasons why were that the BDL need to run 10 springs to not slip. Mucho pressure. Another is that the clutch wears and turns go to 0. At that point the throw-out has some real load on it..

 

The angle of the ramps is likely 18 degrees and straight. I looked at the patent.. @Ohio HD collected the dimensions and posted info here.. Personally I'd figure the ramps should be regressive. A little more at first but a little less at full pull.

https://www.hdforums.com/forum/milwa...l#post21650582

 

What makes the Muller pull easier is the increased length. Just like some of the adapters like Burly they sell that connect to the end of the ramp and cable. The 18⁰ is what I have now which is what it came with stock. 06 and up came stock with the reduced effort ramp assy which I believe is the same as the 21⁰ version with a slight modification to the ramps. The teardrop tapered socket in Muller's have to do something with a shortened lift too it seems just by looking at it.

 

You have it backwards.. Think about it. What is harder to climb a 18 degree incline or a 21 degree? 18 is easier but if you walk the same distance on both you'll be lower height wise.

The early TC ramps were 21 while the 06 up ramps were 18.

Look at the link not only was the arm longer but the ramps are closer to the center. It's kind of like a rear wheel.. Increase the diameter of the rear pulley and you put more force to the ground. Decrease the diameter of the rear wheel and you do the same.. The muller does both.

 

Yeah that makes sense. I guess I did get it backwards. I was too lazy to run out to the garage and look at the easy pull one in the cabinet. I know it's marked, I just guessed wrong apparently.
So, anymore ideas on what I could try?

 

I had the Easy Pull Ramp 25604-00A in my bike. Which I believed to be the 18⁰ version. I think I got it from JP Cycles years ago. Now I have a OE 21⁰ ramp in it with what I was told is a measured 257 lb Diaphragm Spring.