2002 Bombardier Quest 650XT Service Manual, Page 115Get this manual
Section 03 ENGINE Subsection 08 (CYLINDER AND HEAD)
CYLINDER
Removal
Lock crankshaft with locking bolt (PN 529 035 617), refer to CRANKSHAFT AND BALANCER SHAFTRemove: chain tensioner breather decompressor camshaft timing chain cylinder headPull cylinder no44Discard cylinder gasket no45
CYLINDER TAPER IN DIAMETER mm (in) NEW MAXIMUM SERVICE LIMIT 0.038 mm (.001 in) 0.090 mm (.004 in)
Distance between measurements should not exceed the service limit mentioned aboveCylinder Out of Round Measure cylinder diameter in piston axis direction from top of cylinderTake an other measurement 90 from first one and compareNOTE: Take the same measuring points like described in Cylinder Taper above
Inspection
Cylinder Check cylinder for cracks, scoring and wear ridges on the top and bottom of the cylinderIf so, replace cylinderCylinder Taper Measure cylinder bore and if it is out of specifications, replace cylinder and piston ring set no46Measure cylinder bore at recommended positionsSee the following illustrationA B