Originally posted by BundyMan
Looking at it, kyosho is still using Centax-2. I am referring to the "clutch gap".
Kyosho has different clutch shoes, different hardness centax clutch springs and different flyweights that you can play with for different track conditions.
The tension of the centax spring is usually set on the track to see how the clutch response is required for a given clutch setup.
Wide open tracks usually require bigger clutch gap. Smaller tracks usually smaller clutch gap. Bigger clutch gap gives more agressive engagement and vice versa.
Usually if you go with smaller clutch gap, you may want to tighten the centax spring for the engine RPM to wind up a little to avoid the clutch bogging down when it engages.
When you add shims in the thrust bearing front, you're actually making the clutch gap closer. When you're putting shims inside the clutch in between the clutch nut and the bearing, you're making the end play less. Less end play will only give you more life to your thrust bearing and ensures that your clutch shoes do not rub on the clutchbell during idling which if it rubs may cause the engine to stall and which will make the clutch shoe wear higher or worse still meltdown !