Determining whether a motorcycle has an internal or external transmission generally requires visual inspection and knowledge of the specific make and model. Here's how you can generally identify the type of transmission:
External Transmission: External transmissions, also known as exposed or visible transmissions, are more commonly found in older motorcycles or certain types of custom bikes. Here are some signs that indicate an external transmission:
- Look for a visible gearbox housing located on the side or bottom of the engine. It typically appears as a separate component attached to the engine case.
- Observe the presence of a visible gear shift lever or linkage on the side of the motorcycle that allows the rider to manually change gears.
- External transmissions often have exposed gears that can be seen when the engine covers or clutch cover are removed.
Internal Transmission: Internal transmissions, also called integrated or hidden transmissions, are the standard design in modern motorcycles. They are enclosed within the engine cases, making them less visible. To determine if a motorcycle has an internal transmission:
- Examine the engine case. If it appears as a smooth, one-piece structure without any obvious external gearbox housing, it likely has an internal transmission.
- Check for the absence of a visible gear shift lever or linkage. On motorcycles with internal transmissions, gear shifting is typically done through a mechanism located inside the engine.
Manufacturer Documentation: Consult the owner's manual or manufacturer's specifications for the motorcycle. They often provide detailed information about the transmission type and design.
Online Resources: Research the specific make and model of the motorcycle online. Manufacturer websites, motorcycle forums, or enthusiast websites may provide technical specifications or diagrams that indicate the type of transmission.
Keep in mind that there can be exceptions and variations in motorcycle designs, so it's always best to refer to reliable sources specific to the motorcycle in question or consult with a professional mechanic for accurate information.