This was...stupid of me?
Took the Kent out of the RF 90, replaced it with the fresh one. Old motor had an AP ring-style clutch, the new motor has a Tilton. Old disc was about 90 thou thick, new one is considerably thicker. Bolt it together and off to Mosport.
Clutch doesn't fully disengage - almost, but not quite, making leaving from a stop difficult without stalling. My assumption was that I had failed to bleed all the air out of the system, and therefore wasn't achieving full travel. So I bleed it several times over the day Saturday, to no avail. No change.
Now I am worried that I've got the seals on the slave cylinder nicked and that I am going to have to break the car in two. And I am pissed about it.....Yes, always put a new slave cylinder kit in when you have the motor out!
It never occurred to me (because I totally forgot about it) that I am now using a thicker disc and a different clutch, and the darn system might just require a little more stroke . Finally late on Saturday the idea hits me, I adjust the M/C pushrod, and voila! Perfection.
It's funny how simple things are sometimes.
best,
bt