ec nrcal data MD2010 M D2020 M D2030 M D2040 Piston ring gap in cylinder measured in mm, top compression ring 0.13-0.25 (.0051-.0098 in) 0.10-0.22 (.0039-.0118 in) 0.10-0.30 (.0039-.0118 in) 0.15-0.27 0.20-0.35 (.0059-.0106 in) (.0078-.0137 in) 0.12-0.24 0.20-0.40 (.0047-.0094 in) (.0078-.0157 in) 0.20-0.35 0.20-0.40 (.0078-.0137 in) (.0078-.0157 in) 2nd compression ring Oil ring Piston ring clearance in groove measured in mm top compression ring 0.06-0.10 (.0023-.0039 in) 0.05-0.09 (.0019-.0035 in) 0.02-0.06 (.0007-.0023 in) 0.06-0.10 0.065-0.110 (.0023-.0039 in) (.0025-.0043 in) 0.05-0.09 0.013-0.035 (.0019-.0035 in) (.0005-.0013 in) 0.02-0.06 0.030-0.130 (.0007-.0023 in) (.0011-.0051 in) 2nd compression ring oil ring .........................................................................
Gudgeons pins MD2010 M D2030 MD2040 Clearance, gudgeon pin - gudgeon bushing in mm 0.013-0.030 (.0005-.0011 in) -0.004- +0.008 (-.0001- +.0003 in) 18.996-19.002 (.7478-.7481 in) 19.015-19.026 (.7486-.7490 in) 18.998-19.004 (.7479-7481 in) M D2020 0.006-0.023 0.010-0.027 (.0002-.0009 in) (.0003-.0005 in) -0.004- +0.006 -0.001- +0.011 (-.0001-+.0002 in) (-.00003- +.0004 in) 20.998-21.002 27.994-28.000 (.8266-.8268 in) (1.1021-1.1023 in) 21.010-21.021 28.010-28.021 (.8271-.8275 in) (1.1027-1.1031 in) 20.998-21.004 27.999-28.005 (.8266-.8269 in) (1.1023-1.1025 in) Gudgeon pin - gudgeon pin hole in mm Gudgeon pin diameter in mm Gudgeon bushing's int.
diameter in mm Gudgeon pin hole's diameter in piston in mm Cylinder head M D2010 MD2030 MD2040 Height in mm M D2020 54.9-55.1 (2.161-2.169 in) 64.6-65.4 69.7-70.3 (2.543-2.574 in) (2.744-2.767 in) Valve seats (inlet outlet) I nlet, diameter in mm 25.35-25.45 (.9980-1.001 in) 21.85-21.95 (.8602-.8641 in) 2.05-2.15 (.0807-.0846 in) 30.35-30.45 36.35-36.45 (1.194-1.198 in) (1.431-1.435 in) 26.85-26.95 32.35-32.45 (1.0570-1.0610 in) (1.2736-1.2775 in) 2.25-2.35 2.05-2.15 (.0885-.0925 in) (.0807-.0846 in) Outlet diameter in mm Depth in mm Crankshaft with bearing (Replaceable bearing cups for main and big end bearings) Crankshaft, axial clearance in mm MD2010 M D2020 M D2030 M D2040 0.1-0.3 (.0039-.0118 in) 0.1 -0.3 (.0039-.0118 in) Main bearing, radial clearance in mm, No.
1 0.05-0.30 0.1-0.4 (.0019-.0118 in) (.0039-.0157 in) 0.035-0.072 (.0013-.0028 in) 0.055-0.092 (.0021-.0036 in) 0.035-0.072 (.0013-.0028 in) 0.035-0.072 (.0013-.0028 in) 0.055-0.092 (.0021-.0036 in) 0.039-0.106 0.044-0.116 (.0015-.0041 in) (.0017-.0045 in) 0.039-0.106 0.044-0.116 (.0015-.0041 in) (.0017-.0045 in) 0.039-0.092 0.044-0.102 (.0015-.0036 in) (.0017-.0040 in) No. 2 No. 3 10