The speed in km/h per gear can vary depending on the vehicle's make and model. However, as a general guideline, in most manual transmission cars, the speed in km/h per gear typically increases as you shift up. For example, in first gear, you might reach speeds up to 30 km/h, while in second gear, you could go up to 60 km/h, and so on. It's important to consult your vehicle's manual for specific information on the speed range for each gear. **

From 5th gear, the next gear in most manual transmission vehicles is 6th gear. However, some vehicles may have additional gears beyond 6th, such as 7th or 8th gear. The higher gears are typically used for cruising at high speeds on highways to improve fuel efficiency and reduce engine strain. **

It is not recommended to use fifth gear when driving uphill, as it may strain the engine and cause it to work harder than necessary. It is better to downshift to a lower gear, such as third or fourth, to maintain a steady speed and prevent the engine from overworking. This will also provide better control and power when driving uphill. **

The size of a gear can change in several ways. One way is by changing the number of teeth on the gear. Increasing the number of teeth will make the gear larger, while decreasing the number of teeth will make it smaller. Another way is by changing the diameter of the gear. Increasing the diameter will make the gear larger, while decreasing the diameter will make it smaller. Additionally, the pitch circle diameter, which is the diameter of the circle that passes through the points of contact between two gears, can also be changed to alter the size of the gear. **

From the 5th gear, you can shift to the 6th gear in most vehicles. The 6th gear is typically the highest gear in a manual transmission, providing the best fuel efficiency at high speeds. It is important to shift smoothly and at the appropriate time to ensure optimal performance and fuel economy. **

No, it is generally not allowed to shift directly from 3rd gear to 1st gear in a manual transmission vehicle. Shifting directly from a higher gear to a much lower gear can cause damage to the transmission and engine. It is recommended to downshift through the gears sequentially, such as from 3rd to 2nd and then to 1st, to ensure smooth and safe operation of the vehicle. If a sudden stop is required, it is best to use the brakes to slow down the vehicle before downshifting to 1st gear. **

No, the neutral gear in a Zündapp moped is not the same as the first gear. The neutral gear is a separate position on the gear shift that disengages the engine from the transmission, allowing the bike to roll freely without the engine's power. The first gear is the gear that provides the lowest speed and highest torque, allowing the bike to start moving from a standstill. It is important to understand the difference between these two gears for safe and efficient operation of the moped. **

The size of a gear is typically calculated based on the pitch diameter, which is the diameter of the gear measured at the point where the teeth are the same size as the space between them. The pitch diameter is calculated using the number of teeth on the gear and the diametral pitch (for inch units) or module (for metric units). The formula for calculating the pitch diameter is Pitch Diameter = Number of Teeth / Diametral Pitch (or Module for metric units). This calculation is important for determining the proper meshing of gears and ensuring the correct transmission of power between them. **