2006 Honda TRX680 Rincon Factory Service Manual, Page 277Get this manual
CRANKCASECRANKSHAFTBALANCER CRANKSHAFT AND BALANCER INSTALLATION Apply engine oil to new rear crankshaft bearingDrive the crankshaft bearing into the rear crankcase with the marking side facing upTOOLS: Driver Attachment, 78 90 mm Pilot, 40 mm 07749-0010000 07GAD-SD40101 07746-0040900 DRIVER
For other bearing replacement in the crankcase halves, see page 13-10
ATTACHMENTPILOT Engage the crankshaft and balancer by aligning the index lines on the sides of the balancer drive and driven gears as shown, and install them together into the rear crankcaseBALANCER DRIVEN GEAR
BALANCER DRIVE GEAR Assemble the special tools onto the crankshaftBe careful not to let the connecting rod press against the crankcase mating surface while drawing