Hello everybody,
I own a twin and I have 8 gallons of gaz to burn with it. My problem is: when I start to lean the high end to reach the maximum RPM, the motor start, time to time, to run only on one cylinder like if a wire spareplug wire would connect and disconnect very rapidely. It function with 94 octane and Motul synthec 50:1. I think that if the motor becomes lean on the high end, it will lose speed and shoul not lose the function of one of both cylinders.

send that ignition back or fix a loose wire in that set up........

All of the above.

look into the plug caps and make sure the spring is not folded back.the resister in the cap could also be bad.they will cut in and out like that.i would send it in as 3w ignitions have a 3 year warrenty on them.