I have 16T front sprocket,carburetor has needle shim and 130 main jet,Hi-Flo air filter,and aftermarket exhaust.My bike pulls steadily from 60 kms in 5th gear.I never need to rev the bike out in 4th.I normally cruise at 110 to 115.I rarely need to down shift for any hills.But I only weigh 140 lbs.
Most of my riding is on the highway.