When I was running my Kawasaki 1000 drag set up back in 80’s we built wheelie bars out of small chrome Molly tubing out to the max length at that time, very flexible, bike left hard as the bar’s acted like a long torque bar, planting the rear slick as the the front tire rose, the great part was it didn’t try to hop like shorter more stiffer bars, just a great hard pull as it launched all the way to shift into 2nd, I think you guy’s are on to something on rider weight location affecting 60 ft. FYI, I ran low 10 second times in the mid 130 mph range, had a great time
