There may be a torque loss low end but my motor has exactly the same power it always had. Once it reaches the rev limiter in 3rd and 4th it is going as fast as a 17t in 5th gear can go.
The only time you lose performance is if your motor cannot spin it up. Our motors can spin up a 19t front sprocket but they cannot hit the limiter in 5th. My GPS read up 94 in 4th and 114 in 5th with my 19t. Some or our 16 and 17t guys are not getting that. But 3700 at 70MPH is real comfortable.
Not being a red light drag racer I will stay with that. A 19t bike likes being mid 3k to 4k RPM range and will roll on from 60 like a thoroughbred.
