2004 Bombardier Rally 200 Series Shop Manual, Page 118Get this manual
Section 03 ENGINE Subsection 07 (LUBRICATION SYSTEM)
If difference exceeds service limit, replace the complete oil pump assemblyNOTE: When the axial clearance of the oil pump shaft assembly increases, the oil pressure decreases (less discharge)Check the inside of oil pump housing and crankcase area for scoring or other damagesIf so, change the complete oil pump assemblyNOTE: If the surface shows small groove, use grindstone to burnish burrsWhen the oil pump is seized, replace crankcase assembly and complete oil pumpR175motr144A