2003 Polaris Scrambler 50-90 Sportsman 90 Predator 90 Service Manual, Page 39Get this manual
ENGINE Driveshaft (Transmission) Assembly 6Install the drive axle assembly, washers, main axle and primary axleRefer to 2.10 for order of assemblyMain Axle Drive Axle Assyexcessive, resurfacing head or replacement is needed
Primary Drive Assy7Install the transmission cover gasket and install the transmission cover while mating the splines togetherTorque the bolts to specification
Cylinder Head Warp Service Limit: .002! (0.05 mm) Cylinder Inspection 1Inspect the surface of the cylinder for warpageClean all gasket residue completely from sealing surfaceUse feeler gauge and straight edgeMeasure the gap six (6) different ways as shown in illustration at leftNormal gap should be .002 (0.05 mm) or lessIf gap is excessive, resurfacing cylinder or replacement is needed