| a slipper clutch should have 9 drive plates in it
and the drive plates when stacked together on there own should measure 22.5mm
if the pack is less than this you should replace one of the 1.5mm steal plates with a 2mm item
you need to work out how many dished plates you have.
there should be a maximum of 4
I run mine with 2
then these need to be placed apposing each other throughout the clutch pack | 
Threaded Mode