by Backyard Bob » Wed Mar 27, 2019 11:17 pm
Rust remover removes rust. Heat yes but first squirt a liberal amount of PB Blaster on the outside of the screw area and work some into the handle bars through the neck area. If you can tap the handlebar/throttle area with a brass hammer, or equivalent without damaging the bars, that's even better. In 'applying heat' I'd use a hand held propane torch and only heat it up enough to where it's extremely warm to the touch. If you've got a vise with aluminum or copper jaw covers clamp your bars in with the screw facing up afterwards. If you have access to a manual impact driver give it a couple of shots with a hammer. If it still won't come loose apply more PB Blaster and let it sit for a few days before giving the impact driver another shot. Drilling is last resort but if you do use a left hand drill bit. It can catch at the end and unscrew whats left of the screw.