Will a tank from a 76-77 MC-5 fit the 75 Hi-breather frame ?
I don't think so because the MC5 is a non hi-breather and the frame tube is narrower and ligher. I believe the MC5 was about 7 pounds lighter than the previous bikes. A GS6 tank will work. I have never tried the MC5 tank so I am only partly solid on the yea or nay.