Join Date: Feb 2012
Location: Albuquerque, NM, USA
Re: Getting a vintage pre 1970 Boxer What?
You're right at the transition year to the /5 models, which started in 1970.
You must be referring to them, since there was not a "75" version of earlier models.
I'd avoid what's called the "short wheelbase" version of /5, which are 1970-1972 and go instead for a 1973. All the look, but much better handling. 750 is the way to go, as the smaller versions are a little more troublesome with carbs.
'12 R1200RT, '02 R1100S, '84 R80G/S