XS11 Cylinders 2&3 not firing

[CaptonZap]

Just because we're here, and on the subject of TCI's, here is a little quick check to see if the TCI is working
On the two outside wires of the 8 pin plug at the TCI, grey and orange wires, there is enough space to insert the volt meter probe from the outside and touch the spade connector that is in there.
Put your meter on DC volts, ground the black lead, insert the red lead into either the grey or orange wire socket, making sure that you are touching the connecter inside, and turn on the ignition. You should read 11 to 13+ volts, depending on the condition of the connecters between the battery and the TCI.
Hit the starter button, and watch the volts. If it drops down to 3-5 V, that side is working. Check the other side with the same drill.
After the key is left on, but the starter is dis-engaged, the voltage should go back up either immediately, or after 10 to 20 seconds, depending on which circuit the pickup coil stops on.
CZ

[visago22]

ok now after some messing about , it seems to be up to its old tricks.

I did the test Capt. suggested.
when turning on key, i have 10v
turning the key to start, grey wire drops to 0-3
and orange goes 3-5
both jump back up to 10 after

[BA80]

It's possible the TCI is bad, but not as likely as a pickup coil wire or pickup coil itself. I still think that's where the problem lies.

[motoman]

Also may wanna check prim. voltage at coils, key on. Any loss there from what battery shows, key on, may trace to cruddy internals of kill switch or its associated plug-in along right-side of frame under tank. JAT.

[CaptonZap]

ok now after some messing about , it seems to be up to its old tricks.

I did the test Capt. suggested.
when turning on key, i have 10v
turning the key to start, grey wire drops to 0-3
and orange goes 3-5
both jump back up to 10 after

Check and see if the coil with the grey wire feeds cylinders 2 & 3. Something is amiss.
Check your battery voltage. Charge if below 12.5 V
And you should have the same voltage, within a quarter of a volt, ignition on, starter off, at the grey and orange wires at the TCI as you have at the terminal on the starter solenoid that has the heavy wire from the battery. If you don't, and 10 Volts sounds low, check all the wiring plugs and jacks and clean them.
Take the red wires that feed the coils, disconnect them from the harness, and jumper them to the battery terminal of the starter solenoid, and try the test again, and see if your voltage readings are equal, and the same as battery voltage with no starter engaged. They should be. If they are, try starting the engine. Do not run for more than 30 seconds with that set up.
Do you have clean spark plugs?
You might try swapping plugs from 2 & 3 to 1 & 4, and see if anything changes.
CZ