Britbike forum Forums Thread Like Summary - Triumph Cub Engine Numbers

When did the Cub engine number stamp move from the front mounting lug to the plinth under the cylinder? I know I stumbled across a date in an internet search, but I can't find it now!
Regards,
Tom

Cubs (and Terriers) were numbered sequentially when made at Meriden and by Aug 64 had reached just over 100000. In Sep 64 numbers restarted at 101 and continued until production moved to Small Heath sometime in 1965. BSA built Tiger Cubs, Bantam Cubs and Mountain Cubs had number blocks allocated, which makes dating them a bit more difficult as a block could start of 2000, for example and could overlap. As a general rule, those made at Meriden had the engine number on the front mounting and will be three digits or low four digits, those built at Small Heath are on the side under the barrel and four digits 2000 or higher, but this is only a guide. Mike Estall;s Tiger Cub Bible has more details on this.