1986-1987 Honda Fortrax TRX70 Service Manual, Page 25Get this manual
MAINTENANCE
DRIVE CHAIN
Stop the engine and put the transmission in NEUTRAlRemove the drive chain inspection hole capCheckthe amount of drive chain slack through the inspection
holeCHAIN SLACK: 10-20 mm 13841"1
Adjust as follows: Carefully stand the Fourtrax on its rear carrier and rear wheels