2002 Bombardier Quest 650XT Service Manual, Page 144Get this manual
Section 03 ENGINE Subsection 10 (GEARBOX)
Index lever with roller no11 must have free movementMeasure the gap of shift fork engagement grooveNOTE: Both gears no26, no31 have same gap width and same service limitGAP OF SHIFT FORK ENGAGEMENT GROOVE NEW MINIMUM NEW MAXIMUM SERVICE LIMIT 5.00 mm (.197 in) 5.10 mm (.201 in) 5.20 mm (.205 in)
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AShift fork claw thickness
Check shift drum tracks for scouring or heavy wear like rounded engagement slotsReplace isolating washer no13 if there are signs of wear or visible damages