How can you safely add 7300 miles to the odometer of a 99 Harley Davidson XLH1200 motorcycle without driving it the bike needs 7800 miles on it for CA registration it doesn't have CA emissions?

the speed sensor is on the transmission and should have three wires going to it. red is 12+, black is ground and white is the speed signal going to the speedometer. this signal is a 12+ square wave pulse which is counted and converted to miles. one method is to place bike on a block and let it idle in fifth gear but this will take awhile depending on how many miles you need to add. another way is to get a signal generator and hook up to the white wire from the speed sensor with it removed from the connector. adjust the out put for a 12+ pulse if you generator will go that high, if not crank it as high as it will go and hopefull the speedometer will count it. turn on the ignition, engine off, and adjust the square wave output frequency until the speedometer will register, higher mph-the quicker the miles. if it sets a speedometer code, do not worry, it can be erased after you are through.