are there much differences in the body work with a mc21 and mc28? can they be interchanged? looks very similar to me. thanks

Lowers and mid are identical, top on the '28 has the cut outs that the GP bikes used for intakes, seat on the '21 ends before the tank, 28 is flush.
'28 tank is a slightly different shape to the '21.

All interchangeable.
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread

Steady on Fontyyy. Mid panels are not identical.

I think that it's the left side most forward bolt that connects the mid to the upper that is in a slightly different position. It's about 10mm I think, and if you look on the inside face of the panel you can still see the injection markings from the MC21 panel that they obviously used as a base.

I may be wrong on the bolt, but it's definitely one of the mid to upper bolts that's out of position.

If I am not mistaken the 28 ones also have an air intake that goes to the air box.

Then I stand corrected but "an air intake that goes to the air box"? Hmmm, "an air intake that goes somewhere quite near the air box" maybe....
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread

What about the tails? Do they bolt right up? I do like the roundness of the 28's tail light area.
_________________
MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600

so can i use the body off a mc21 on my mc28? would it just take a little work or is it much more complex? thanks

Not a great deal of work providing you swap the whole lot together I'd suggest.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball