Rear cylinder switches off when hot.

[Roaming Wolf]

In my case it is a blend of picture one and picture 2. The sensor is the same as in the upper picture but with a different connector and I have a knock sensor as in the bottom picture. From what I see, a normal Harley 99-2017 sensor can be used. It is also 2 wires. I will need to order a female connector and reconnect the 2 wires. Already did the same job with my O2 sensors. Both are working fine.

 

[SKOGDOG]

Please let us know how it works out. Inquiring minds, etc……..

 

[Roaming Wolf]

Update. S&S confirmed that I can use a normal Harley CHT sensor, just need to wire a new connector. I checked the ignition coil and it seems to be fine. I have single fire 0.5Ohm. Measured the resistance. On the connectors it shows 0.5 and 0.5 which is normal and on the spark plug wires connectors - 11. The coils seems fine, but I ordered a new one just in case. However, it might be another, much more simple issue. The coil is mounted with 2 bolts to a metal plate that, I believe, grounds it. If removed, the bike will not start, no spark. The way it is designed (and painted black) makes it super hot in our climate. There is almost no ventilation. I cleaned all the surface, put it back together, started the bike and let it idle for some time giving it some extra RPM. No issue, the rear cylinder is on and does not cut off. Will be testing more. Any aftermarket coil covers with vents?