2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 125Get this manual
CYLINDER HEADVALVES Turn the lensioner lifter shaft fullv in {clockwise} and secure il using the stopper toolThis 1001 can easily be made from thin (1 mm thickness) piece of steel
19mm 3mm
M ATERIAL THICKNeSS: 1.0