1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 229Get this manual
ENGINES Oversized Piston And Ring Chart Pistons and rings marked 25 equal .25mm (.010") oversized Pistons and rings marked 50 equal .50mm (.020") oversized Pistons and rings marked 10 equal1.0mm (.040") oversized
Engine Model NoEC38PLE All EC35PL EC28PFE All EC25PF (except following) EC25PF-04 Piston Length 78mm 78mm 70mm 70mm Piston 10 38A 35B 35B 28 1W-2W-5W 1W-2W-5W 1W-2W-5W 3W-4W 3W-4W 3W-4W Oversize (mm) .25 .50 .25 .50 .25 .50 .25 .50 1.0 .25 .50 1.0 .25 .50 Piston Part No3084735 3084736 3084162 3084163 3084807 3084808 3083943 3083944 3083972 3083902 3083903 3083973 3084995 3084996 Ring Part No3084738 3084739 3084165 3084166 3084810 3084811 3083678 3083717 3083974 3083678 3083717 3083974 3084888 3084889
Magnum EH42PL-01 Service Data
Rocker Arm Rocker arm 10 Rocker shaft 00 Clearance between shaft and arm Cam lobe height In Ex Camshaft journal 00 Camshaft journal bore 10 Oil clearance Cylinder Head Valve Seat Surface warpage limit Standard height Contacting width .8669-.8678" (22.020-22.041 mm) .8656-.8661" (21.987-22.0 mm) .0008-.0021" (.020-.054 mm) .0039" (.10 mm) 1.2884-1 .2924" (32.726-32.826 mm) 1.2766" (32.426 mm) 1.2884-1.2924" (32.726-32.826 mm) 1.2766" (32.426 mm) 1.4935-1.4941" (37.935-37.950 mm) 1.4935-1 .4941" (37.935-37.950 mm) 1.4963-1 .4970" (38.005-38.025 mm) 1.4963-1 .4970" (38.005-38.025 mm) .0022-.0035" (.055-.090 mm) .0039" (.10 mm) .0020" (.05 mm) 3.870" (98.3 mm) .028" (.7 mm) .055" (1.4 mm) .039" (1.0 mm) .071" (1.8 mm) .2362-.2367" (6.0-6.012 mm) .689-.709" (17.5-18.0 mm) .039" (1.0 mm) .031" (.8 mm) .047" (1.2 mm) .031" (.8 mm) .2343-.2348" (5.950-5.965 mm) .2341-.2346" (5.945-5.960 mm) .0014-.0024" (.035-.062 mm) .0016-.0026" (.040-.067 mm) .0059" (.15 mm) 3.976" (101.0 mm) 3.984" (101.2 mm)