All content contained in this website is © R3W and GeeJay design. No content may be reproduced in any format without the prior written consent of the domain owners. All enquiries to be addressed to doc@r3w.co.uk Engine Numbers Decoding the information Primarily for 850cc engines  Example engine number:  2D/85/65955 The first number and letter combination refer to the year and month of manufacture, this can be established from the list below. • Year :-  0=1980, 1=1981, 2=1982, 3=1983, 4=1984, 5=1985, 6=1986, 7=1987, 8=1988, 9=1989 and repeat 0=1990, 1=1991, 2=1992 etc • Month:-A=Jan, B=Feb, C=Mar, D=Apr, E=May, F=Jun, G=Jul, H=Aug, J=Sep, K=Oct, L=Nov, M=Dec So our example number 2D/85/65955 was made in either 1982 or 1992 (the serial number confirms which decade it was manufactured in) The month of manufacture was April. The next set of number(s) 2D/85/65955 gives the engine size, 85 = 850cc The third set of numbers 2D/85/65955 is the serial number of the engine.