1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 318Get this manual
ELECTRIC STARTING SYSTEM
5.Measure: Brush length (each) Out of specification Replace the brushBrush length: 12.5 mm (0.49 in) Wear limit: 5 mm (0.20 in
6.Measure: Brush spring force Fatigueout of specification Replace as setBrush spring force: 780 1,021 (27.5