2004 Official factory service manual for Yamaha YFZ450S ATV Quad., Page 346Get this manual
FAULTY GEAR SHIFTING CLUTCH SLIPPINGDRAGGING EBS00541
TRBL SHTG
FAULTY GEAR SHIFTING
HARD SHIFTING Refer to "CLUTCH DRAGGING"SHIFT PEDAL DOES NOT MOVE Shift shaft Bent shift shaft Shift drum and shift forks Groove jammed with impurities Seized shift fork Bent shift fork guide bar
Transmission Seized transmission gear Jammed impurities Incorrectly assembled transmission Shift guide Broken shift guide
JUMPS OUT GEAR Shift shaft Improperly adjusted shift lever position Improperly returned stopper lever Shift forks Worn shift fork