1985-1995 Polaris ATV and Light Utility Hauler Service Manual, Page 230Get this manual
ENGINES
Magnum Service Data
Valve Spring Free length Orange Paint Yellow Paint Cylinder Std Limit Std Limit 1.7342" (44.05 mm) 1.656" (42.05 mm) 1.654" (42.0 mm) 1.575" (40.0 mm) .075" (1.9 mm) 2.5 .0020" (.05 mm) 3.4606-3.4614" (87.900-87.920 mm) .0020" (.050 mm) .0020" (.050 mm) .0006-.0018" (.015-.045 mm) .0024" (.060 mm) .020" (.5 mm) 3.4596-3.460" (87.875-87.885 mm) 3.4695-3.4699" (88.125-88.135 mm) 3.4793-3.4797" (88.375-88.385 mm) .9055-.9057" (23.0-23.006 mm) .9053-.9055" (22.994-23.0 mm) .0002-.0003" (.004-.008 mm) Piston pin must be fitted into position with thumb at 68 (20 C) .0079-.0138" (.20-.36 mm) .039" (1.0 mm) .0079-.0138" (.20-.36 mm) .039" (1.0 mm) .0079-.0276" (.20-.70 mm) .059" (1.5 mm) .0016-.0031" (.040-.080 mm) .0059" (.15 mm) .0012-.0028" (.030-.070 mm) .0059" (.15 mm) .9058-.9063" (23.007-23.020 mm) .0003-.0010" (.007-.026 mm) .0020" (.05 mm) .0039-.0256" (.1-.65 mm) .0315" (.80 mm) .0004-.0015" (.011-.038 mm) .0020" (.05 mm) .0024" (.06 mm)