4. LUBRICATION SYSTEM K-XCT 125i SERVICE INFORMATION GENERAL INSTRUCTIONS The maintenance of lubrication system can be performed with the engine installed in the frame. Drain the coolant before starting any operations. Be careful when removing and installing the oil pump not to allow dust and foreign matters to enter the engine and oil line. Do not attempt to disassemble the oil pump. The oil pump must be replaced as a set when it reaches its service limit. After the oil pump is installed, check each part for oil leaks. SPECIFICATIONS Unit: mm Standard Inner rotor-to-outer rotor clearance 0.15 Outer rotor-to-pump body clearance 0.150.2 Rotor end-to-pump body clearance 0.040.09 ENGINE OIL At disassembly: 1.2 liter Engine Oil Capacity At change: 1.0 liter Recommended Oil SAE15W40 API: SJ TROUBLESHOOTING Oil level too low Poor lubrication pressure Natural oil consumption Oil level too low Oil leaks Clogged oil filter or oil passage Worn piston rings Faulty oil pump Worn valve guide Worn valve guide seal Oil contamination Oil not changed often enough Faulty cylinder head gasket Loose cylinder head bolts 4-2