At present I am running a 16 tooth gearbox sprocket & 45 tooth rear wheel sprocket. Pulls away fine. Fine in technical lanes. Just revs it's guts out at 45 MPH & above. How many teeth dare I increase on the rear wheel to reduce revs at 45-55 without over affecting the bottom end too much. IE Needing to slip clutch on take off & not having the agility in technical, low speed situations.