[GulfCoastDave]

My Haynes shop manual shows a Bonneville frame that consists of 2 pieces... front part and rear sub-frame. At what point did the frame become one single piece? Was it prior to the OIF frame?
Best to all,
GCoastDave

 

[KADUTZ]

If I understand the question first 1 piece bonnie frame was 1971 model. 1959 thru 1970 had a front and seperate rear section that was a bolt on

 

[peintremondain]

the oil in frame frame(?)is the first one piece (all welded) frame made by triumph for the bonneville(in fact it was a common frame for bsa and triumph as they were financially the same company)in1971
ben

 

[GulfCoastDave]

Thanks Guys!
Dave

 

[DAGAD]

You say 'common frame' however the engines are NOT interchangeable.................
Roy.

 

[peintremondain]

that's true and i know the whole history...one of the last chapter of the "splendor and misery of the british motorcycle industry" and also ,arguably, a small chapter in the history of the technocratic arrogance and blindness.
ben