Well one of his four posts mentions a slipping clutch, and if it's really slipping badly I can see a reduced speed...think feathering the clutch and grabbing a handful of throttle.
Barring that a stock Rebel should be capable of hitting 55mph in third gear --- about the time you should be shifting into 4th if you really like winding it up.
Barring that a stock Rebel should be capable of hitting 55mph in third gear --- about the time you should be shifting into 4th if you really like winding it up.