Exhaust 1980 750 C ?

It fits perfect 3/4 of the way, the only difference is where the back mounting holes are, they move around some based on the model. Not hard to make a pair of plates to adapt it to work though. The system fits to head.

You may need to drill the exhaust collars to head or use the '81 parts, the '80 exhaust stud was 6 mm. and the '81 should be bigger at 8 mm.