65cc Pax Racing Power Valve Spring

Pax Racing "EVC" (EXHAUST VELOCITY CONTROLLER) is a progressively wound spring that will give your bike more mid-range power without taking away from your low-end or top-end power. 

Models                         Years

GasGas          MC65     2021+

Husqvarna     TC65      2017+

KTM                 SX65      2009+