2000 Polaris Pro 785 Service Manual, Page 369Get this manual
ThermoPop off Valve Assembly Internal Pop-off Valve (Longer End Towards Engine)
Thermostat Thermostat Base Gasket
Items circled with: are calibrated restrictors and the orifice sizes must not be changed
Valve Spring-
Cooling water to engine
Exhaust Manifolds
Water Distribution Manifold