I run a pro motion "Kustom" clutch and LOVE it. It has no chatter, its easily engaged, and it will hold EVERYTHING I will ever throw at it. Call Walt and aski him about the clutch I run and he will give you skinny on it. My dad runs almost the same clutch only his disc is slightly different (its like the mcCleod dual friction disc.) He has a billet flywheel and I do not, that is the main reason our disc are different.
http://www.promotionpowertrain.com/
As for the FMS HD, it was the only clutch I ran before switching to the pro motion setup. The only reason I switched was because it would slip on a hard launch on my ET streets. It was NOT and I emphasize NOT grabby what-so-ever. It did have a heavy pedal feel, but I actually grew to like that aspect of it as it gave me more control over how I slipped it and such. I would have continued to use it if it would have held on my launch.
http://www.promotionpowertrain.com/
As for the FMS HD, it was the only clutch I ran before switching to the pro motion setup. The only reason I switched was because it would slip on a hard launch on my ET streets. It was NOT and I emphasize NOT grabby what-so-ever. It did have a heavy pedal feel, but I actually grew to like that aspect of it as it gave me more control over how I slipped it and such. I would have continued to use it if it would have held on my launch.