I guess I'm the first to complain about the excessive effort required to operate the throttle (1K). For me, the return springs would make my hand go numb just trying to maintain a steady speed, and I'm not too keen on throttle locks, so I bought a spring and simply hooked it to the connecting rod between the 2 throttle bodies on the right side. I fabricated a plate and bolted it to a blank bolt hole on the rear cylinder and hooked it up. All it does is to help pull the throttle open by overcoming the factory return springs. Yes, it is safe, no, it will not stick open, it can be adjusted to your liking and it has just been tested with a 1,000 mile trip... no more fatigue.