1987-1997 Yamaha Big Bear 350 4x4 service manual, Page 82Get this manual
3Install: Circlip (New) Valve guide (Oversize) Use Valve Guide Remover CD with Valve Guide Installer (YM-04017) After installing valve guideUse the 7.0 mm Valve Guide Reamer (YM01227) to obtain proper valve guidevalve stem clearance Recut the valve seat