Bilko you need the shorter springs. I think if you phone Camlam you may find there is two types for the 6 plate clutch but confirm this.
Best thing is to get back to basics.
Leave all the plates out for a moment. Just assemble the springs and the pressure plate. Wind the compressor in untill just before the springs are coil bound. The pressure plate must be sitting low enough so that you can see the bottom cork would fit properly into the recess.
If all is good there double check with just one cork and the bottom steel with the extra long turned up tangs.
Make sure the cork fits into the recess and that the bottom steel cannot drop too low and spin under the spider.
If all is ok assemble the rest of the clutch. Fit the circlip but leave the clutch compressed. With a feeler gauge measure between the top plate and the top cork. Less than a mm and the clutch will drag. Much more and the springs will not be able to excert enough pressure on the corks and they will slip under load. I would set a limit of 1.5mm.
If the distance is greater than this start with a thicker top plate and move down through the steels untill you have bridged the distance. If its less than a mm, 2mm top plates are available or exchange your spider for one with a circlip housing higher up. This obviously works in reverse. Be aware though that the higher up the circlip the more likely the top cork will be able to jump the turrets so bend the top corks ears down.
Next you need to look at both your clutch actuating lever on the case and the clutch lever on the bars.
If you have the yamaha type clutch lever suspect this straight away. I've found these actually move the cable less than std Lammy levers. You can modify the Yam lever by heating the lever and bending it outwards to give more clearance.
If you have an aftermarket actuating lever check its long enough(but not too long) and that when it starts to engage the clutch its at 90 degrees to the case. All these things will have an effect on how far the brass plunger depresses the clutch.
Good luck
