The standard MaxTorque clutch uses a single length of tension spring hooked at its ends to form a spring ring.
The spring sits in a deep channel in each of the six metal shoes and holds them away from the drum surface at low/zero revs.
Springs are available in various strengths giving quoted engagement speeds from around 1200 rpm. to around 3000 rpm.
If the clutch is ‘grabbing’ at reasonable idle speed the spring may be of too low a strength, weakened due to overheating or broken or unhooked.
You can check for tension on the spring by levering the shoes outwards with a flat blade screwdriver through the slots in the non sprocket side of the clutch.
The Honda carb has 2 external adjustments. The black plastic throttle stop screw on top of the carb. and the brass idle fuel screw on the side of the carb.
Idle adjustment procedure.
Start engine and warm up. Adjust the brass screw to give highest revs. (Opening up the screw richens the mixture.)
Back off the plastic throttle stop screw to give reasonable idle.
From memory!! Idle mixture screw ends up around one turn open from fully closed.
These carbs are well known for blocking the idle fuel jet , black plastic item which can be prised out of the top of the carb after the throttle stop screw has been removed. Should be an O ring on it.
IMO your Max Torque clutch should be perfectly adequate. The Magnum is an alternative but the multitude of settings etc. can be confusing.