I used a big electric impact..
240 ft/lbs capacity I think. Heat may help, that Jap loctite is strong stuff. I used a universal joint made especially for impact guns-6 point sockets. It was a bear. That bike was killed by a car and I will have to do it again eventually as money allows. Your local auto parts store may rent tools, the one here does. If not, try heat(consider the switch) and 6 point socket with a breaker. A second set of hands to keep the socket on might help. I have a cheater pipe about 6 feet long, but a 2nd set of hands is a must with that. Good luck.