Im converting to a Dual Bearing Chain Roller. like this>>> Chain Roller YFZ 450 Raptor 700 YFM 700 YTZ 250 34mm CR02 34 | eBay Stock on left, Dual Bearing on right. My weapons of choice to do the job. Stock rollers. The roller is off and this is the shaft that has to be removed. Most of it is removed. Im using a 1/2 flat washer and sanding the shaft flat until i hit the washer. The new Dual Bearing Chain Roller. Use the nut to lock it in good.