BSA S27 chassis number

[pulhamdown]

Hi.  I`ve recently acquired a 1927 BSA S27.  Can anyone tell me where the chassis number is stamped on the frame.  I`ve had a good look, but no luck yet.  There`s a fair bit of tape holding cables, wires etc, which could be hiding the number.

[Revband]

BSA usually stamp the frame number on the headstock, if the bike has had a replacement frame in the distant past then the frame would have been supplied unstamped.

[Goldy]

If you look on the BSA owners web site you will see the sort of number that you should be looking for. all the best.                         http://www.bsaownersclub.co.uk/Engine_Frame_Listing.html     

[pulhamdown]

Thanks.  I know what the number should be, it`s just locating it.  At least I have narrowed down the places to look - thanks.

[pulhamdown]

Hi.  I`ve now found the chassis number stamped on the downtube just under the seat on the nearside.  It was hidden by a battery box which had been clamped onto the down tube.
While checking the BSA owners club website, I discovered an error - they had listed the run of chassis / engine numbers which included mine as 4.98, instead of 4.93.  They`ve told me this will corrected shortly.  Thanks for your help.