Stealth 11, Speedbug,
This is a very good method of removing a broken bolt, I to have used this method many times, the only issue I have when giving this kind of advise on an open forum is that many people are not aware of the precautions that must be taken when welding.
First off the Spyder has many electronic control modules, these are sensitive to high voltage and current spikes. Usualy removing the battery cables is ok but if you do not want to fork our $$$$ for a new control module then I suggest disconnecting all the control modules.
Then there is the fact that you have a gas tank right above the drive sroket in question, this is a very dangerous situation and extreem precaution must be taken when welding in proximity of a gas tank. Removal of the tank would be a good idea.
And finaly there is the placement of the ground clamp from the welding unit, this shaft runs through the engine via gears and bearings, if you ground on the engine casing then this is going through bearings and gears and can couse damage to these components, we have seen this in machinery many times and it has led to very expensive repairs.
Speedbug, if you are going to use this method then please use a large pair of visegrips and clamp it to the shaft without touching the engine casing or the bike frame, clamp the ground wire from the welding machine to the vise grips.
Edited by Trebor, 23 July 2015 - 08:18 AM.