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My first couple times strapping a bike down I did it on the kickstand. I learned though.
I have also blown a main/ignition fuse after shorting something out. Dumb.
Not my personal stupidity, but I bought a tl1000 that had the top end replaced and the guy could never get it to run. I set the timing twice and still had the same problem. After doing some research it turns out the idler for the cams can be off 180 degrees with respect to tdc or something, I don't even remember. I had to advance the gear with the timing chain off a certain number of teeth (it had an odd number) and then reset the timing. Rode that thing to nashville after, ran great. Got it very cheap because of that issue.