Can the ball bearings in the centre of the clutch escape in to the motor?
The clutch is designed to lift by a maximum of 2.5mm. When assembled on to the gearbox input shaft correctly they will be limited to this by the washer under the main fixing nut acting as a travel stop. The ball bearings in the clutch ramp mechanism are 6mm in diameter; with everything correctly assembled a 6mm ball cannot get out of a gap, which at max will be 2 .5mm. All you have to do is correctly assemble the centre nut and its washer according to the instructions that came with the clutch and to the recommended torque settings and it can’t go wrong.