15/20 Master Specifications
15/20 Master Specifications
Cylinder Block/Crankcase Specifications
Number of cylinders 2
Displacement 351 cc (21.4 cu in.)
Standard bore 61.0 mm (2.4016 in.)
Standard bore (service limit) 61.06 mm (2.4039 in.)
Cylinder bore maximum taper (service limit) 0.08 mm (0.0032 in.)
Cylinder bore maximum out of round (service limit) 0.06 mm (0.0023 in.)
Crankshaft main bearing journal 35.99 mm (1.4169 in.)
Crankshaft main bearing journal (service limit) 35.97 mm (1.4161 in.) or less
Crankshaft pin journal 29.98 mm (1.1803 in.)
Crankshaft pin journal (service limit) 29.95 mm (1.179 in.) or less
Crankshaft end play 0.05?0.15 mm (0.002?0.006 in.)
Crankshaft runout Less than 0.05 mm (0.002 in.)
Crankshaft runout (service limit) 0.05 mm (0.002 in.) or more
Crankshaft main bearing oil clearance 0.012?0.044 mm (0.0005?0.0017 in.)
Crankshaft main bearing oil clearance (service limit) 0.06 mm (0.002 in.) or more
Crankshaft pin bearing oil clearance 0.010?0.036 mm (0.0004?0.0014 in.)
Crankshaft pin bearing/connecting rod oil clearance (service limit) 0.060 mm (0.002 in.) or more
Connecting rod wrist pin bore diameter 16.01?16.04 mm (0.630?0.631 in.)
Connecting rod wrist pin bore diameter (service limit) 16.04 mm (0.631 in.) or more
Connecting rod crankshaft pin diameter 29.995?30.021 mm (1.1809?1.1819 in.)
Connecting rod crankshaft pin diameter (service limit) 30.023 mm (1.182 in.) or more
Connecting rod side clearance 0.1?0.25 mm (0.004?0.01 in.)
Connecting rod side clearance (service limit) 0.6 mm (0.0236 in.)
