Re: 62mm SRT6 Pulley Available Now
At the risk of being told that I have not got a SC pulley other than the OEM one I will offer a possible cause for clutch plate slippage.
As the speed of the SC increases the forces to turn the SC increase in greater proportion than the speed increase. This results in the clutch plate slipping against the electromagnet.
Slipping causes friction and friction causes heat, none of which are helpful.
Certain materials have a greater attraction to a magnetic force, hopefully the clutch plate is made from such a material, to maximize the force available. Some materials get magnetized and stay slightly magnetized and will attract steel and iron, you do not want that either in a clutch plate as it will attract material peeled of the clutch plate and electromagnet causing more slipping if it sticks to the face.
A damaged electromagnet will probably cost more to replace than the pulley.