2004-2005 660 Yamaha Rhino Factory Service Manual, Page 38Get this manual
ENGINE SPECIFICATIONS Item Cooling system Radiator core Width Height Thickness Radiator cap opening pressure Radiator capacity (including all routes) Coolant reservoir Capacity From low to full level Water pump Type Reduction ratio Shaft drive Middle gear backlash Final gear backlash Differential gear backlash Lubrication chart Standard
380 mm (14.96 in) 238 mm (9.37 in) 24 mm (0.94 in) 107.9137.3 kPa (1.0791.373 kgcm2, 15.3519.53 psi) 2.5 (2.20 Imp qt, 2.64 US qt)