Suzuki tried to make the 87 carb work like a four stroke carb.  Installing the jets from the 88 to 90 carb will not make the 87 carb work the same as the 88 to 90 carb.  The 87 carb needs some machine work on it to make it a good carb.

Yes there will be minor changes needed typically a slight tweak on the A/s , a needle  clip adj and a main change. Nothing major though , usually the pilot circuit is most effected due to a stronger signal working on the orifices from the smallreed having a higher intake velocity and less damping effect due to a smaller intake tract volume.