2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 11Get this manual
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GENERAL INFORMATION
SPECIFICATIONS PB5FB #82 #40 #40 See page 5-16 See page 5-17 10.7 mm (0.42 in) 1,600 100 rpm (min"- mm (185116 in)
CYLINDER HEADVALVE SPECIFICATIONS