Malossi spring/weight kit for your malossi delta/fly 105/107mm clutch. Comes with a chart showing the spring tensions included.
The preload of the clutch springs determines the moment when the clutch is opened and carries the power to the gearbox. As stiffer the springs or as higher the preload the later the clutch sets in. A good setting of the moment (relating to the revs of the engine) gives a perfect acceleration from the start.