RCMAN46 wrote:
Changing the rear end gearing will not give you more power. It may allow you to pull a hill in a higher gear but in the end you will probably take about the same amount of time to pull a long grade and at near the same speed.
Only changes to the engine will give you more power.
That's true but lower rear gears can make the difference between staying in a particular gear and dropping down one more. With the wide spread between gears in a 4-speed that can make a lot of difference in road speed, though not as much with 6+ speeds.