Guys,
Not sure what the engine number was the bike was registered as a D10, the spark plug went in slanted like the D7, but I am absolutely sure it had 4 gears, I know it didn't have 3 gears, I could never had put up with only 3 gears. It could have been a D10s engine, the bikes cycle parts was listed as a Bantam Supreme, DEK907E, (DEK), Wigan registration code, Supplied by Millers of Wigan & Chorley, God Rest Her & all who sailed in Her!
It wasn't the very different looking D14/4 power plant, my carburettor was an AMAL Monobloc
I had some really good technical books/ Manuals on the Bantam & let them go for nothing, when I sold it,Duh!
Cheers
JBW