Sherco Xtrem chain guide ( 2014 - 2023 ) - BlueSherco Xtrem Chain guide. Weight : 0. 35 Kg. Blue chain guide for Sherco 250SE Racing 300SE Racing 250SE Factory 300SE Factory 250SC Factory 300SC Factory 250SEF Factory 300SEF Factory 250SEF Racing 300SEF Racing 250SCF Factory 300SCF Factory ! Made for enduro and hard enduro use, it protects the front fixation tab like no one else on the market and will reduce the risk to break it. It has been machined in the mass of UHMW plastic, which offers a