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It's possible.... According to my handy dandy RPM calculator, 5500 RPM in third gets you 89 MPH...
This. The 6 speed bikes are geared very tall. 3rd gear makes a great passing gear on a 2 lane road. 80 mph happens easily, and a stock 103 is perfectly happy revving to 5k RPM. I wouldn't want to cruise at that RPM for hours on end though.
maybe your lower gears are not working and you are starting off in a higher gear?
my thoughts too...I had tranny problems that caused a second neutral at 4th gear.One could think he was in first when actually in 3rd and be shifting 3 thru 6 only.