If you want to install a 150mm rear tire on a classic Signals 350 motorcycle, there are a few changes you may need to consider:
Rear Wheel: The first and most obvious change would be to replace the existing rear wheel with a wider wheel capable of accommodating the 150mm tire. You'll need to find a compatible rear wheel that matches the specifications of your motorcycle and is designed to fit a 150mm tire.
Swingarm Modification: A wider tire may require modifications to the swingarm, which is the part of the frame that holds the rear wheel. The swingarm might need to be widened or replaced with a wider one to accommodate the larger tire.
Chain Adjustments: With a wider tire, the chain alignment may need to be adjusted. This could involve repositioning the rear sprocket, adjusting the chain tension, or possibly replacing the chain altogether.
Fender Modifications: A wider tire may cause clearance issues with the rear fender. You may need to modify or replace the fender to provide sufficient space for the tire.
Suspension Adjustment: Installing a wider tire could affect the motorcycle's suspension dynamics. It may be necessary to make adjustments to the suspension settings to ensure proper handling and stability.
Final Drive Ratio: A wider tire can affect the motorcycle's final drive ratio, potentially impacting acceleration and top speed. You might need to adjust the sprocket sizes to compensate for the larger tire and maintain the desired performance characteristics.
Legal Considerations: It's essential to check local regulations and laws regarding tire sizes and modifications. Some jurisdictions may have restrictions on tire width or modifications that require approval or certification.
Please note that modifying a motorcycle's tire size can have implications for its performance, handling, and safety. It is recommended to consult with a professional mechanic or motorcycle specialist who can provide guidance based on your specific motorcycle model and local regulations.