I have got to share this with someone! I ordered the ABS option on my scooter and have now run through some personal tests on flat, dry asphalt. Riding solo the bike stops from 50mph to 0mph in about 76 feet. Riding two up with a guy who weighs about 270lb, the bike stops in about 65 feet. To put this in perspective, I was seeing stars from the deceleration when doing the test two up. I never did totally stomp on the brakes because I was afraid I would black out from the deceleration G's. The bike came to a graceful stop in all situations. It was initially surprising that the bike stopped faster with two of us on it until I realized the rear passenger made the rear brake even more effective. The DVD Harley supplied with the bike said that tire chirping and black marks are normal with ABS. I got neither during the tests. I feel the brakes pulsing, but nothing extreme or annoying.