Thanks to all the help from this forum I have been able to get my barn find 1981 GS550L to a,,, running-ish state.
Issue is I just can't seem to keep it running under 2k RPM.
Here it is running feels stable and could run forever.
I turned the idle down under 2k. It just continues to lower and lower until it just dies.
For video of above see link: https://drive.google.com/file/d/1vF2FYEu3S3Nwbkj5zmFM20TLjRv-mVBY/view?usp=sharing
I am not sure that it matters but before the above I noticed that cylinder 3,4 was kind of cold 70F so I leaned out the mix and they are now up to 130-140F. So now the four temps seems to stabilize at:
1 = 135
2 = 205
3 = 130
4 = 140
Not sure if this is correct, but it did start to run better. Not sure I am doing the right thing, or if it is even related, but seemed to be a good idea.
Any ideas I would love to hear them.