Harley-Davidson motorcycles, like most motorcycles, require the rider to be in first gear before giving them gas to start moving. When starting from a stop, you typically engage the clutch, shift into first gear, and then gradually release the clutch while applying throttle to accelerate smoothly.
Once you're in motion and have reached an appropriate speed, you can shift into higher gears (such as second, third, and so on) to maintain a comfortable and efficient riding pace. Shifting gears on a Harley-Davidson or any motorcycle should be done smoothly and at the appropriate engine RPM range for optimal performance.
If you try to shift from first gear directly into second gear without giving enough throttle or without being at an appropriate speed, the motorcycle may stall. This is because shifting into a higher gear without adequate speed and engine power can put a strain on the engine, causing it to lose momentum and stall.
Proper shifting technique involves smoothly transitioning through the gears while matching engine speed (RPM) and road speed. This ensures a seamless transfer of power from the engine to the rear wheel. Each motorcycle has its own specific RPM range where shifting is most effective, so it's important to consult the owner's manual or get familiar with the recommended shift points for your specific Harley-Davidson model.
Remember, practice and experience will help you develop a feel for when to shift gears on your motorcycle to maintain smooth and efficient riding.