As per title, thats what i have. I have a jb 5 plate clutch on a rb20 that had new steels and plates about a month ago. I have also put in a centre spring as the uprated ones i brought from Andy Francis are not up to the job and slipped in all gears....

Anyway the centre spring was a last minute bodge as i didnt have anything to hand and had to get out that weekend. i dont think the centre spring is letting it engage properly and i put the drag down to that. The Judder on the other hand i cant seem to shift and has been present over the last 3 clutch overhauls. No matted how i adjust the cables its always there when i clutch down into first when coming to a stop at lights or junction, causing a knocking sound that can also be felt through the frame. The plates have been measured and seem spot on so im stumped.
I now have some uprated mb springs and am looking for some thinner steels (currently have 1.0) I think MB do 0.9...? and have been told that Kegra do even thinner so will change both when i find thinner plates. Im looking for things in the mechanicals that might cause judder so any suggestions on what to look for would be appreciated.
ta
Sef