Sorry, let me explain in more detail, I did disconnect from each coil, when I disconnected from the right coil engine run fine with both cylinders firing, both exhaust pipes were equally hot. I have a degree in electronics and know how to check diodes with an ohm meter and that one was bad, replaced it and runs great, thanks again for your help, I used to work on small engines in the past but was not familiar with the twin cylinders and did not know about the diodes.