2002 Bombardier Quest 650XT Service Manual, Page 93Get this manual
Section 03 ENGINE Subsection 07 (LUBRICATION SYSTEM)
ENGINE OIL PRESSURE REGULATOR
The oil pressure regulator is located on the engine MAG side (behind magneto housing cover)
Inspection
Inspect valve piston for scoring or other damagesCheck compression spring for free lengthCOMPRESSION SPRING FREE LENGTH NEW NOMINAL SERVICE LIMIT 64 mm (2.519 in) 63.3 mm (2.492 in)
Replace both parts if important wear or damage are presentClean bore and threads in the oil pump housing from metal shavings and other contaminations
Installation
For installation, reverse the removal procedure
OIL PUMP
R610motr49A
The oil pump is located on the engine MAG side (refer to Engine Oil Pressure Regulator)
1Oil pressure regulator plug