1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 140Get this manual
CRANKCASECRANKSHAFTTRANSMISSION Measure the side clearance between the connecting rod big end and the crankshaft flyweight with feeler gaugeSERVICE LIMIT: 0.80 mm (0.031 in)
Measure the radial clearance at the connecting rod big endat two points in the and directionsSERVICE LIMIT: .05 mm (0.002 in)
Turn the inner race of each bearing with your finger The bearings should turn smoothly and quietlyAlso check that the bearing outer race fits tightly in the crankcase Remove and discard the bearings if the races do not turn smoothlyquietlyor if they fit loosely in the crankcase