Cooked CDI

[nigelbates]

Has anyone ever cooked a CDI on their RR? My 2017 300 racing stopped today it has no spark. Checked all the usual couldn't find a fault. We had 5 betas between us so swapped parts turns out my CDI is faulty !!! Any idea why it's done that? Put a known good one on my bike it runs well put my cdi on another bike no spark. I'm concerned it's not the root cause of the problem though and if I fit a new one it will just cook that one too $$$

Thanks

[aj_mariner]

Is the coolant thermostat/temp regulator just above it leaking anything on it?

[nigelbates]

On my bike it's in the air box under the battery it looked ok bit dirty but nothing you wouldn't expect.

[Clearvu1]

Could be a faulty ground. Any other odd happenings on the machine? Is the voltage regulator working at 14 volts? Horn, starter or other problems?

[nigelbates]

The earth on the coil was not very nice, very muddy and not a tight fit. Didn't notice until I stripped all the wiring back to check connectors. Everything else check out fine as far as I can tell.