2006-2008 Yamaha Snowmobiles Apex/Attak Factory Service Manual, Page 465Get this manual
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GENERAL TORQUE SPECIFICATIONS DEFINITION OF UNITS
A (nut) 10 mm 12 mm 14 mm 17 mm 19 mm 22 mm
B (bolt) mm mm 10 mm 12 mm 14 mm 16 mm
A: Distance across flats B: Outside