Engine number advice
My 1970 amazon 133 has an engine number 4969 11 xxxx. I realise the 69 is for B20 and 11 is for 118 bhp and "C" camshaft.
I bought a spare engine years ago, advertised as being removed from 140. This engine number is 4969 20 2350. I cannot find any info relating to 20. Grateful for any info received.
Chris.
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