2006-2012 Honda TRX90 TRX90EX/X Service Manual, Page 40Get this manual
MAINTENANCE Install the air cleaner housing cover and secure it with the retaining clipsInstall the seat (page 2-31
SPARK PLUG
Disconnect the spark plug cap
Clean around the spark plug base with compressed aj( before removmg the plugand be sure that no debris IS alowed co emer
Clean around the spark plug base and remove the spark plug
mto the combus tion