TM Design Chain GuideTM Design KettingblokYAMAHAYZ125 08-20YZ250 08-20YZF250 07-20YZF450 07-20WRF250 07-20WRF450 07-20- All new "Factory Edition SX" series of Compact chain guides designed just for Moto-Supercross riders.- Used and Tested by the SX Lites Factory teams 5150 Energy, BPR, Rock River-Cycle trader, Yamaha Support riders.- This guide has been issued a Utility Patent # 9469779 in USA and EU Patent # ECD2583716-0001- Our exclusive Impact return memory formula plastic absorbs impacts and resist bending under load.- The wear pad bottom is longer than stock so chains jumping the sprocket are virtually eliminated.- The chain guide body is changed so oversize sprockets do not prematurely wear lower chain pad.- The overall width is narrower than stock and has higher ground clearance so you can rail deep berms and ruts..- Black anodized alloy collars, OE style bolts, and if you break the guide within a year (USA only) we replace it.Kettingblok, Chain GuideTM DESIGN Partnumber YZCH-SX5-BK