Greeves and BSA?

[Sigean]

Hi,

New to this forum... I have a 1970 Greeves Griffon and whilst I have the original engine and gearbox, I am interested in the possibility of fitting a four-stroke engine/gearbox for use of the machine on the road.  I have seen many Greeves-Triumph hybrids, but I have always preferred BSA engines and would like to prepare a Greeves-BSA variation.  Could anyone advise on the engines from the old BSA range - 250 to 500cc preferred - that might be suitable? 

I would prefer not to have to cut the frame, as I would like to retain its originality for the future.

Kind regards,

Peter

[Tony39]

My only input would be that pre-unit BSA's are big and bulky and would probably have to be ruled out.  Engines such as the C15 are compact and may well fit into a Greeves frame without having to alter it apart from the mounting plates.  The pics. are of my 400cc 'Goldie' in an A frame and a C15 ripe for some attention, to compare.

[Welsh Wizard]

if it will take a C15 motor, check fitting for a B40 or B50 motor

[Bomber]

Yep a B50 would make it truley lively

[Sigean]

Many thanks for the comments - very helpful.  I am familiar with the B series from BSA as I have a B31 and I know how heavy and bulky these engines are.  The B50 seems like an interesting suggestion, one I had not considered thus far, and I will explore this further. 

Kind regards,

Peter