I hate to be the devil's advocate, but there's no free lunch. Acceleration will be quicker, but the 520 chain is slightly weaker than the stock 525 or 530 chain. Other things will decrease by about 10 percent with the sprocket changes. If your mileage is 40 MPG, it will go down to 36. If top speed was 150, it will be 135. If 60 MPH cruise was at 5,000 RPM, it will be 5,500.