Question on ignition rotor and pulse generator

[miki__]

Hey guys, I crashed a while back; and ever since the bike had not run properly. It revs okay to about 5k and then runs out of steam.
I had the bike at a mechanic for almost two months and I got it back still not working properly (but that is a whole another story) the only thing I have been told is that the engine runs like this because it is not getting enough fuel to the engine.

My questions are:
1. Because I crashed on the right hand side, could the damage to pulse generator or ignition rotor cause the problem (this is what the mechanic claims, but he also didn't know how to adjust fuel/air mixture so I take it with a grain of salt)?
2. Would replacing the pulse generator or ignition rotor solve the issue?

If it helps at all, here are the videos of my crash and one showing how the bike is running afterwards

Thanks, I appreciate any ideas you guys have.

miki__

[The Buddha]

The ignition rotor is it was damaged, will affect evreything ...
The thing usually fails when hot when it starts to die a natural death.

Cool.
buddha.

[miki__]

Cheers Buddha,

I will get it changed than, as soon as I can find one that is 

miki__

[Cerberus73]

If your mechanic can't adjust the fuelling on a relatively simple bike like a GS500.. i think he might be in the wrong profession.. hell I'm no professional mechanic, would never claim to be.. but even a fuckwit like me can rebuild and set up carbs

There are ways to test a pulse generator.. some easier than others. if you have a shop manual there should be a explanation in there how to do it. a really simple way I've done on other small bikes is to remove the magnetic pickups, and use the probes of a multimeter set to the 2k ohm setting. and swipe a magnet over the pickup.. if the readout changes it usually means the pickup is still ok.. There is probably shitloads of posts on here about testing the bike if you do a search.

[miki__]

Thanks Cerberus, yeah the mechanic was a bit of an idiot.