Simple question. Will a 1992 gsxr1100 usd front end fit on a 1988 gsxr 750. If so, what problems are there if any?

Dunno... you should ask in the oil cooled forum .

good question, I have the same bike and wanted to do the same. I know the 2001 1000 forks will fit with some modifications, so a 1100 should fit onas well.