off the top of my head, smaller bore and shorter stroke for the 600, i believe 750's are the same as an 85(6)-87 750 (just different pistons, cams and carbs). the frames are different. suspension and wheels are very different (brakes too). the bodywork is different. the clip-ons and rear-sets are reasonable (early 90's gsx-r's were pretty radical).goodyGracious said:I was looking on cycletrader.com and early 90 katana's looked alot like early 90 gixxers to me. I was wondering if anyone could post the differences between the two.