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Title: BSA Lightning 650 engine and frame numbers.
Post by: FENIGHTING on 04 Jun, 2019, 19:15

Can anyone tell me if the frame number and engine number should match exactly? My engine number and frame match except for "- Y" on the engine.

Title: Re: BSA Lightning 650 engine and frame numbers.
Post by: ChrisG on 05 Jun, 2019, 15:57

I would say, if it has the same nos then take it that it is the original pairing. If you have any doubts obtain a dating certificate from the Dating Officer. You will also know who the supplying dealer was as well.

BSA Owners' Club Workshop Discussions

The BSA Workshop => Twins => Topic started by: FENIGHTING on 04 Jun, 2019, 19:15