Brand new to bikes. Considering a newer shadow with a shaft drive for the reliability but concerning the extra power loss; how much is it? Would it be noticeable between an 03 to an 07 or whenever they switched over to shaft drive on the shadow, or any other bike for that matter? Feel free to compare other bikes like say the intruder vs the marauder, same bikes except for the drive train. Opinions? I´ve read 10%-30% power loss chain to shaft which sounds significant. Are those exaggerated? Thanks guys/gals