I have an 03 1800R. Recently I have noticed a pulsating vibration at around 70-75 mph in 5th gear while cruising on the Interstate. No heavy acceleration when the pulsating occurs. I'm wondering if anyone has had a similar issue and what the resolution and the cause was found to be. I have almost 17k miles on it and ride almost daily. Bought it back in March 2021 with 10 K miles on it. Thanks for the help y'all!