2008 Polaris ATV Sportsman 300 400 H.O. Service Manual, Page 89Get this manual
ENGINE (300) NOTE: The flats of the wave washer are positioned against the intake rocker armStarter Drive Grease: (PN 2871460) 2Apply Starter Drive Grease (PN 2871460) to the drive bushings in the cases and all moving surfaces of the starter drive gears and installInstall recoil housing and torque bolts to specificationEngine Installation Notes
3Install the rocker arms in the same position as marked during disassembly
After the engine is installed in the frame, review this checklist and perform all steps that apply: General Items Repeat steps in reverse order in the "Engine Removal" section to reinstall the engine Install previously removed components using new gaskets, seals, and fasteners where applicable Add engine oil and check oil level after running the engine for short period of time (see Chapter 2)CVT System Clean clutch sheaves thoroughly and inspect inlet and outlet ducts for proper routing and sealing Inspect clutches as described in chapter 6Transmission Inspect transmission operationExhaust