I've got my 66 650 engine completely dismantled, except for the pesky outer race of the crank bearing. Last night I went after it with a propane torch and with 02 and map gas. No luck. I ran into my friend Basil, a local Triumph guru, at the store today and told him of my troubles. He said he used to throw the case into the oven at 350°, so after dinner I pre heated the oven and put the case in bearing side down, after 10 minutes we heard a crash as the Bearing race fell out on its own and hit the lower rack. Priceless!