As Tom noted, you have VM carbs that don't require as much vacuum to work properly
The differences between the C and EC - std bike has wire wheels, 1 disc brake up front
E model has cast wheel, 2 discs up front
Different paint schemes
There's a chart that shows what jets you should have, I think the 78 750 is one of the strange ones that has different sizes as standard
I like www.jetsrus.com for jets, if you need them
BTW, I think you've taken the idea of sealing up the aiorbox a bit too far, there has to be an opening somewhere to let the air in!
The differences between the C and EC - std bike has wire wheels, 1 disc brake up front
E model has cast wheel, 2 discs up front
Different paint schemes
There's a chart that shows what jets you should have, I think the 78 750 is one of the strange ones that has different sizes as standard
I like www.jetsrus.com for jets, if you need them
BTW, I think you've taken the idea of sealing up the aiorbox a bit too far, there has to be an opening somewhere to let the air in!