If you've tried getting lube in from the top, you could also try tipping some lubricant - "plus gas" would be my choice - in from the bottom bracket, with the bike upside down; leave 24 hours. Otherwise, as above, gentle gentle heating.
After that I guess you're putting it a vice and twisting...
ouch :(
If you've tried getting lube in from the top, you could also try tipping some lubricant - "plus gas" would be my choice - in from the bottom bracket, with the bike upside down; leave 24 hours. Otherwise, as above, gentle gentle heating.
After that I guess you're putting it a vice and twisting...
good luck!