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#P5875
Polini torque springs with evo slider for Piaggio 50cc 2-stroke engines.
The evo slider helps stop the torque spring from binding when being compressed.
Choose between 0%(28kg), +8%(30kg), +15%(32kg) or +28%(36kg) strength increase.
Polini 243.101, 243.102, 243.103, 243.105