The last one I did was a bear. I twisted the allen wrench and then got the bright idea of taking a long screw driver and putting it between the radiator and the frame and smacking it good with a hammer. At angal in the direction to loosen it.
It was Hugo's bike Jay, not yours ;o). That loosened it up enough to get it to break free. When I was braking
them loose at first I was doing it from the left side with the radiator loosened and pushed as far out of the way as I could then I found A way to do it from the right side that gave me more leverage. From the left side I had to cut the allen wrench down. I would have to have one apart and in frount of me to give a step by step. I whish I would take the time to make a web page so I could share the pictures. I have welded quite a few stock ones and haven't burnt one up yet. I cut the tube 3/4 of an inch from the plate (got to get it off first)with tin snips and then weld the tubes till they're just round bumps on the plate. Put the o-rings back on the back side, have my kid put it back in and tighten the allen down and I finish it off. If you had one of those inpach driver that you hit with a hammer and got a 5mm allen socket, could get it between the radiator and the frame (looen the right of left radiator so, you have room) and pow the problem would be over. I have one and it dident down on me till now
You can get all that stuff at kragen. 5mm socket that is an allen wrench long exstantion and inpack driver.
maybe the frame is in the way thats why I used the screw driver.
I'll go look.