Model Numbers Dates Frame# Engine#
CB750 44,649 April 1969 July 1970 CB750-1000001 to CB750-1044649 Same range as frame
CB750 K1 77,157 July 1970 – Sep 1971 CB750-1044650 to CB750-1121806 Same range as frame
CB750 K2 63,500 Oct 1971 – Aug 1972 CB750-2000001 to CB750-2063500 Engine = frame + 7700 approx
CB750 K2 Europe 2567+ Jan 1975 – Dec 1975 CB750-2100001 to CB750-2102567 (2567 or more) Germany, France, UK, Sweden
CB750 K3 38,000 Sep 1972 – Jun 1973 CB750-2200001 to CB750-2238000 Engine = frame + 6100 approx
CB750 K4 35,000 Jun 1973 – May 1974 CB750-2300001 to CB750-2335000 CB750E-2300001 to CB750E-2335000 approx
CB750 K5 42,000 May 1974 – Dec 1974 CB750-2500001 to CB750-2542000 CB750E-2335001 to CB750E-2377000 approx
CB750 K6 53,000 Dec 1974 – Jun 1976 CB750-2542001 to CB750-2597000 CB750E-2377000 to CB750E-2458065 approx
CB750 K7 38,000 Jun 1976 – May 1977 CB750-2700001 to CB750-2738000 CB750E-2700001
CB750 K8 36,000 May 1977 – May 1978 CB750-2800001 to CB750-2836000 CB750E-3000001
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427,149
JDM K4 6000+ Jun 1973 – May 1974 CB750-2400002 to CB750-2406000+ Engine = CB750E-2341915
JDM K6 721+ Dec 1974 – Jun 1976 CB750-2410601 to CB750-2411321 Engine = CB750E-2436325 to CB750E-2472214
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6721+
CB750F
F 15,000 Jan 1975 – Feb 1975 CB750F-1000002 to CB750F-1015054 CB750E-2500004 to CB750E-2515054
F1 22,317 Mar 1975 – Nov 1976 CB750F-2000003 to CB750F-2022317 CB750E-2515055 to CB750E-2537317
F2 25,000 Nov 1976 – May 1977 CB750F-2100001 to CB750F-2125011 CB750E-2600004 to CB750E-2625011
F3 18,400 May 1977 – May 1978 CB750F-2200001 to CB750F-2218400 CB750E-3100001 to CB750E-3118400
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80,717
427,149 +6721 +80717 = 514567 (K and F, no CB750A)
Please send any Europe or JDM updates