What should the compression be on my harley shovelhead?

For a Harley Shovelhead, the ideal compression ratio typically ranges from 8.5:1 to 10:1, depending on the specific model and year, as well as any modifications made. Lower ratiOS are generally more forgiving for pump gas, while higher ratiOS may require higher-octane fuel. It's important to consult your bike's manual or a professional mechanic to determine the best compression for your specific setup. Adjustments to compression can also be influenced by factors like camshaft choice and intended use of the motorcycle.