2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 107Get this manual

2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 107

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CYUNDER HEADVALVES Inspect the rocker arm shafts for wear or damageMeasure the rocker arm shaft .0 SERVICE LIMIT: 9.91 mm 10.390 in)
Measure the free length of the inner and outer valve springsS