78 GS750E Rear Rotor Swap

[Reddog78]

I have a '78 GS750E with dual front calipers and rotors swapped from early 1980's GS's. The rotors are the slotted style which do not match the factory original and later by me, drilled rear rotor.

Thus for looks and to a lesser extent, lower unsprung weight, I'd like to install a later model rear slotted rotor. Currently satisfied with rear braking performance.

Is this a "bolt on" swap and if so will the same 1980 model years fit? Is the rear the same as a right side front rotor? Will the later thinner disk work with the '78 rear caliper or do I need a later caliper?

 

[salty_monk]

It's different from the front that I do know. I am running one on my 78 1000. Whilst my caliper is a later caliper (I bought one rebuilt from someone here from a 82 or 83 GS1100E for a price better than the rebuild kit) there is no noticeable difference that I can see. Any of the E or G model calipers should work.

I am 99% sure I didn't change the caliper holder or spacer pack but I did do it about a dozen years ago so figure me if my memory fails me!