Exhaust question

[reddirtrider]

I've been searching and can't find if an '81 and '83 GS750 exhaust systems are interchangeable. Anyone know offhand?

[Billy Ricks]

Nope, the ports on the '83 are smaller but I guess that could be worked around. The earlier model 750 bikes shared the same port size with the liter class bikes.

[reddirtrider]

Same spacing just smaller ports? Do you have any figures for port size on the 81 vs. the 83? How about mounting points for the cannister?

Hmm, this gives me an idea anyway. I'm going to look into if the GSXR1100 SS2R exhaust that I have laying around will somehow fit the 750.

[Billy Ricks]

Same spacing just smaller ports? Do you have any figures for port size on the 81 vs. the 83? How about mounting points for the cannister?

Hmm, this gives me an idea anyway. I'm going to look into if the GSXR1100 SS2R exhaust that I have laying around will somehow fit the 750.

The 1100 exhaust will probably go right on. The '83 and up ports are 42mm IIRC. Not sure about the earlier ports. Spacing is the same.

[salty_monk]

Nope, the ports on the '83 are smaller but I guess that could be worked around. The earlier model 750 bikes shared the same port size with the liter class bikes.

I had a 750 exhaust that measured 38mm at the end... Was a stock megaphone, defo pre 83. I think you're right the 1000 are 42mm.

[Clone]

The black 750 from the 83 ED and ES are different from the silver 750 16valve engines in the other models. I think the T and L is the second generation 16valve engine and the exhaust for those is the same as the 81.
You could probably check with the online fiche to check the suzuki part numbers. The chrome systems should be comparable, the black one will not fit the silver engine. And conversely the chrome system will not fit the black engine.