1983 Ski-Doo Shop Manual, Page 119Get this manual
SECTION 02 ENGINE SUB-SECTION 07 (ENGINE TOLERANCES MEASUREMENT)
ENGINE TOLERANCES MEASUREMENT
CYLINDER TAPER
Maximum: 0.08 mm (.003")
Compare cylinder diameter 16 mm (58") from top of cylinder to just below its intake port areaOn rotary valve engines, measure just below auxiliary transfer port, facing exhaust portIf the difference exceeds 0.08 mm (,003") the cylinder should be rebored and honed or should be replaced
CYLINDERPISTON CLEARANCE
ENGINE TYPE PISTON TO WALL CLEARANCE MINIMUMMAXIMUM
247 277 377 464 503 534
0.0650.200 mm (,0026.008") 0.0700.090 mm (,0028.0035") 0.0800.10 mm (,0031.0039") 0.0800.100 mm (,0031.0039") 0.0700.090 mm (,0028.0035") 0.1000.120 mm (, 0039.0047")