1985-1986 Honda ATC250R Shop Manual, Page 123Get this manual
TRANSM ISSIONCRAN KSHAFT BALANCER DRIVER 07749-0010000 Install the bearings into the left crankcase using the 1'0110wing tools: Crankshaft bearing: Driver Attachment, 62 68 mm Pilot, 28 mm Mainshaft bearing: Driver 37 40 mm Countershaft bearing: Driver 52 55 mm Pilot, 22 mm
07749-0010000 07746-0010500 07746-0041100 077 49-0010000 07746-0010200 07749-0010000 07746-0010400 07746-0041000
Install new countershaft oil seal and the collarATTACHMENT, 37 40 mm 07746-0010200 thread lock agent to the bearing holder plate attaching screws, then install the screwsTORQUE: 8-12 Nm (0.8-1.2 kg, 6-9 ft-Ib) GASKET
CRANKCASE ASSEMBLY
Install new gasket and the dowel pins