For a 150cc engine, I suggest 12g sliders and the red torque (main) spring to get maximum acceleration without losing top end speed.
Sliders wear much better than due to the increased surface area. The shape also allows better range of the variator than rollers. Lighter weights (rollers or sliders) increase operating RPM and reduce the speed of "upshifts".
The torque spring keeps belt tension and controls "downshift" rate. The stiffer springs prevent belt slippage and shift down your transmission quicker.
Tuning your CVT does not change your transmission ratios, but it changes how the engine shifts through them. Ideally you want to keep the engine close to the top of the peak horse power curve.
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